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llvm/test/Transforms/LoopIdiom/bcmp-negative-tests.ll
T
Roman Lebedev f7a287e981 [LoopIdiom] BCmp: check, not assert that loop exits exit out of the loop (PR43687) 
We can't normally stumble into that assertion because a tautological
*conditional* `br` in loop body is required, one that always
branches to loop latch. But that should have been always folded
to an unconditional branch before we get it.
But that is not guaranteed if the pass is run standalone.
So let's just promote the assertion into a proper check.

Fixes https://bugs.llvm.org/show_bug.cgi?id=43687

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375100 91177308-0d34-0410-b5e6-96231b3b80d8
2019-10-17 11:01:29 +00:00

1000 lines
42 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -loop-idiom -verify -verify-each -verify-dom-info -verify-loop-info < %s -S | FileCheck %s --implicit-check-not=bcmp --implicit-check-not=memcmp
; CHECK: source_filename
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
define i1 @three_blocks_and_two_latches_in_loop(i8* %ptr0, i8* %ptr1) {
; CHECK-LABEL: @three_blocks_and_two_latches_in_loop(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[I_08_BE:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: [[INC:%.*]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_PASSTHROUGH:%.*]], label [[CLEANUP:%.*]]
; CHECK: for.passthrough:
; CHECK-NEXT: br i1 true, label [[FOR_COND:%.*]], label [[FOR_BODY_BACKEDGE]]
; CHECK: for.body.backedge:
; CHECK-NEXT: [[I_08_BE]] = phi i64 [ [[INC]], [[FOR_COND]] ], [ 0, [[FOR_PASSTHROUGH]] ]
; CHECK-NEXT: br label [[FOR_BODY]]
; CHECK: for.cond:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY_BACKEDGE]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
br label %for.body
for.body:
%i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ], [ 0, %for.passthrough ]
%arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
%v0 = load i8, i8* %arrayidx
%arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
%v1 = load i8, i8* %arrayidx1
%cmp3 = icmp eq i8 %v0, %v1
%inc = add nuw nsw i64 %i.08, 1
br i1 %cmp3, label %for.passthrough, label %cleanup
for.passthrough:
br i1 true, label %for.cond, label %for.body
for.cond:
%cmp = icmp ult i64 %inc, 8
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.cond ]
ret i1 %res
}
define i1 @three_blocks_in_loop(i8* %ptr0, i8* %ptr1) {
; CHECK-LABEL: @three_blocks_in_loop(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_PASSTHROUGH:%.*]], label [[CLEANUP:%.*]]
; CHECK: for.passthrough:
; CHECK-NEXT: br label [[FOR_COND]]
; CHECK: for.cond:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
br label %for.body
for.body:
%i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
%arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
%v0 = load i8, i8* %arrayidx
%arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
%v1 = load i8, i8* %arrayidx1
%cmp3 = icmp eq i8 %v0, %v1
%inc = add nuw nsw i64 %i.08, 1
br i1 %cmp3, label %for.passthrough, label %cleanup
for.passthrough:
br label %for.cond
for.cond:
%cmp = icmp ult i64 %inc, 8
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.cond ]
ret i1 %res
}
define i1 @body_cmp_is_not_equality(i8* %ptr0, i8* %ptr1) {
; CHECK-LABEL: @body_cmp_is_not_equality(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp ult i8 [[V0]], [[V1]]
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
br label %for.body
for.body:
%i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
%arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
%v0 = load i8, i8* %arrayidx
%arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
%v1 = load i8, i8* %arrayidx1
%cmp3 = icmp ult i8 %v0, %v1
%inc = add nuw nsw i64 %i.08, 1
br i1 %cmp3, label %for.cond, label %cleanup
for.cond:
%cmp = icmp ult i64 %inc, 8
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.cond ]
ret i1 %res
}
define i1 @only_one_load(i8* %ptr0, i8* %ptr1) {
; CHECK-LABEL: @only_one_load(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i8 [[V0]], 0
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
br label %for.body
for.body:
%i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
%arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
%v0 = load i8, i8* %arrayidx
%cmp3 = icmp eq i8 %v0, 0
%inc = add nuw nsw i64 %i.08, 1
br i1 %cmp3, label %for.cond, label %cleanup
for.cond:
%cmp = icmp ult i64 %inc, 8
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.cond ]
ret i1 %res
}
define i1 @loads_of_less_than_byte(i7* %ptr0, i7* %ptr1) {
; CHECK-LABEL: @loads_of_less_than_byte(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i7, i7* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V0:%.*]] = load i7, i7* [[ARRAYIDX]]
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i7, i7* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V1:%.*]] = load i7, i7* [[ARRAYIDX1]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp ult i7 [[V0]], [[V1]]
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
br label %for.body
for.body:
%i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
%arrayidx = getelementptr inbounds i7, i7* %ptr0, i64 %i.08
%v0 = load i7, i7* %arrayidx
%arrayidx1 = getelementptr inbounds i7, i7* %ptr1, i64 %i.08
%v1 = load i7, i7* %arrayidx1
%cmp3 = icmp ult i7 %v0, %v1
%inc = add nuw nsw i64 %i.08, 1
br i1 %cmp3, label %for.cond, label %cleanup
for.cond:
%cmp = icmp ult i64 %inc, 8
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.cond ]
ret i1 %res
}
define i1 @loads_of_not_multiple_of_a_byte(i9* %ptr0, i9* %ptr1) {
; CHECK-LABEL: @loads_of_not_multiple_of_a_byte(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i9, i9* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V0:%.*]] = load i9, i9* [[ARRAYIDX]]
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i9, i9* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V1:%.*]] = load i9, i9* [[ARRAYIDX1]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp ult i9 [[V0]], [[V1]]
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
br label %for.body
for.body:
%i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
%arrayidx = getelementptr inbounds i9, i9* %ptr0, i64 %i.08
%v0 = load i9, i9* %arrayidx
%arrayidx1 = getelementptr inbounds i9, i9* %ptr1, i64 %i.08
%v1 = load i9, i9* %arrayidx1
%cmp3 = icmp ult i9 %v0, %v1
%inc = add nuw nsw i64 %i.08, 1
br i1 %cmp3, label %for.cond, label %cleanup
for.cond:
%cmp = icmp ult i64 %inc, 8
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.cond ]
ret i1 %res
}
define i1 @loop_instruction_used_in_phi_node_outside_loop(i8* %ptr0, i8* %ptr1) {
; CHECK-LABEL: @loop_instruction_used_in_phi_node_outside_loop(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ [[CMP3]], [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
br label %for.body
for.body:
%i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
%arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
%v0 = load i8, i8* %arrayidx
%arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
%v1 = load i8, i8* %arrayidx1
%cmp3 = icmp eq i8 %v0, %v1
%inc = add nuw nsw i64 %i.08, 1
br i1 %cmp3, label %for.cond, label %cleanup
for.cond:
%cmp = icmp ult i64 %inc, 8
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ %cmp3, %for.body ], [ true, %for.cond ]
ret i1 %res
}
define i1 @loop_has_write(i8* %ptr0, i8* %ptr1, i32* %write) {
; CHECK-LABEL: @loop_has_write(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT: store i32 0, i32* [[WRITE:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
br label %for.body
for.body:
%i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
%arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
%v0 = load i8, i8* %arrayidx
%arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
%v1 = load i8, i8* %arrayidx1
%cmp3 = icmp eq i8 %v0, %v1
%inc = add nuw nsw i64 %i.08, 1
br i1 %cmp3, label %for.cond, label %cleanup
for.cond:
%cmp = icmp ult i64 %inc, 8
store i32 0, i32* %write
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.cond ]
ret i1 %res
}
declare void @sink()
define i1 @loop_has_call(i8* %ptr0, i8* %ptr1, i32* %load) {
; CHECK-LABEL: @loop_has_call(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT: tail call void @sink()
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
br label %for.body
for.body:
%i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
%arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
%v0 = load i8, i8* %arrayidx
%arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
%v1 = load i8, i8* %arrayidx1
%cmp3 = icmp eq i8 %v0, %v1
%inc = add nuw nsw i64 %i.08, 1
br i1 %cmp3, label %for.cond, label %cleanup
for.cond:
%cmp = icmp ult i64 %inc, 8
tail call void @sink()
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.cond ]
ret i1 %res
}
define i1 @loop_has_atomic_load(i8* %ptr0, i8* %ptr1, i32* %load) {
; CHECK-LABEL: @loop_has_atomic_load(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, i8* [[PTR0:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[ARRAYIDX]]
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i8, i8* [[PTR1:%.*]], i64 [[I_08]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[ARRAYIDX1]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_COND]], label [[CLEANUP:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 8
; CHECK-NEXT: [[TMP:%.*]] = load atomic i32, i32* [[LOAD:%.*]] unordered, align 1
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_COND]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
br label %for.body
for.body:
%i.08 = phi i64 [ 0, %entry ], [ %inc, %for.cond ]
%arrayidx = getelementptr inbounds i8, i8* %ptr0, i64 %i.08
%v0 = load i8, i8* %arrayidx
%arrayidx1 = getelementptr inbounds i8, i8* %ptr1, i64 %i.08
%v1 = load i8, i8* %arrayidx1
%cmp3 = icmp eq i8 %v0, %v1
%inc = add nuw nsw i64 %i.08, 1
br i1 %cmp3, label %for.cond, label %cleanup
for.cond:
%cmp = icmp ult i64 %inc, 8
%tmp = load atomic i32, i32* %load unordered, align 1
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.cond ]
ret i1 %res
}
define i1 @different_load_step(i8* %ptr) {
; CHECK-LABEL: @different_load_step(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_015:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[PTR1_014:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[PTR0_013:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[INCDEC_PTR:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[PTR0_013]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[PTR1_014]]
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_015]], 1
; CHECK-NEXT: [[INCDEC_PTR]] = getelementptr inbounds i8, i8* [[PTR0_013]], i64 1
; CHECK-NEXT: [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR1_014]], i64 2
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
br label %for.body
for.body:
%i.015 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
%ptr1.014 = phi i8* [ %add.ptr, %entry ], [ %add.ptr3, %for.inc ]
%ptr0.013 = phi i8* [ %ptr, %entry ], [ %incdec.ptr, %for.inc ]
%v0 = load i8, i8* %ptr0.013
%v1 = load i8, i8* %ptr1.014
%cmp2 = icmp eq i8 %v0, %v1
br i1 %cmp2, label %for.inc, label %cleanup
for.inc:
%inc = add nuw nsw i64 %i.015, 1
%incdec.ptr = getelementptr inbounds i8, i8* %ptr0.013, i64 1
%add.ptr3 = getelementptr inbounds i8, i8* %ptr1.014, i64 2
%cmp = icmp ult i64 %inc, 16
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.inc ]
ret i1 %res
}
define i1 @step_is_variable(i8* %ptr, i64 %step) {
; CHECK-LABEL: @step_is_variable(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_015:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[PTR1_014:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[PTR0_013:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[INCDEC_PTR:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[PTR0_013]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[PTR1_014]]
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_015]], [[STEP:%.*]]
; CHECK-NEXT: [[INCDEC_PTR]] = getelementptr inbounds i8, i8* [[PTR0_013]], i64 1
; CHECK-NEXT: [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR1_014]], i64 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
br label %for.body
for.body:
%i.015 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
%ptr1.014 = phi i8* [ %add.ptr, %entry ], [ %add.ptr3, %for.inc ]
%ptr0.013 = phi i8* [ %ptr, %entry ], [ %incdec.ptr, %for.inc ]
%v0 = load i8, i8* %ptr0.013
%v1 = load i8, i8* %ptr1.014
%cmp2 = icmp eq i8 %v0, %v1
br i1 %cmp2, label %for.inc, label %cleanup
for.inc:
%inc = add nuw nsw i64 %i.015, %step
%incdec.ptr = getelementptr inbounds i8, i8* %ptr0.013, i64 1
%add.ptr3 = getelementptr inbounds i8, i8* %ptr1.014, i64 1
%cmp = icmp ult i64 %inc, 16
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.inc ]
ret i1 %res
}
define i1 @load_step_is_variable(i8* %ptr, i64 %step) {
; CHECK-LABEL: @load_step_is_variable(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_015:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[PTR1_014:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[PTR0_013:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[INCDEC_PTR:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[PTR0_013]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[PTR1_014]]
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_015]], 1
; CHECK-NEXT: [[INCDEC_PTR]] = getelementptr inbounds i8, i8* [[PTR0_013]], i64 [[STEP:%.*]]
; CHECK-NEXT: [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR1_014]], i64 [[STEP]]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
br label %for.body
for.body:
%i.015 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
%ptr1.014 = phi i8* [ %add.ptr, %entry ], [ %add.ptr3, %for.inc ]
%ptr0.013 = phi i8* [ %ptr, %entry ], [ %incdec.ptr, %for.inc ]
%v0 = load i8, i8* %ptr0.013
%v1 = load i8, i8* %ptr1.014
%cmp2 = icmp eq i8 %v0, %v1
br i1 %cmp2, label %for.inc, label %cleanup
for.inc:
%inc = add nuw nsw i64 %i.015, 1
%incdec.ptr = getelementptr inbounds i8, i8* %ptr0.013, i64 %step
%add.ptr3 = getelementptr inbounds i8, i8* %ptr1.014, i64 %step
%cmp = icmp ult i64 %inc, 16
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.inc ]
ret i1 %res
}
define i1 @step_and_load_step_is_variable(i8* %ptr, i64 %step) {
; CHECK-LABEL: @step_and_load_step_is_variable(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_015:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[PTR1_014:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[PTR0_013:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[INCDEC_PTR:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[PTR0_013]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[PTR1_014]]
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_015]], [[STEP:%.*]]
; CHECK-NEXT: [[INCDEC_PTR]] = getelementptr inbounds i8, i8* [[PTR0_013]], i64 [[STEP]]
; CHECK-NEXT: [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR1_014]], i64 [[STEP]]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
br label %for.body
for.body:
%i.015 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
%ptr1.014 = phi i8* [ %add.ptr, %entry ], [ %add.ptr3, %for.inc ]
%ptr0.013 = phi i8* [ %ptr, %entry ], [ %incdec.ptr, %for.inc ]
%v0 = load i8, i8* %ptr0.013
%v1 = load i8, i8* %ptr1.014
%cmp2 = icmp eq i8 %v0, %v1
br i1 %cmp2, label %for.inc, label %cleanup
for.inc:
%inc = add nuw nsw i64 %i.015, %step
%incdec.ptr = getelementptr inbounds i8, i8* %ptr0.013, i64 %step
%add.ptr3 = getelementptr inbounds i8, i8* %ptr1.014, i64 %step
%cmp = icmp ult i64 %inc, 16
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.inc ]
ret i1 %res
}
define i1 @load_step_not_affine(i8* %ptr) {
; CHECK-LABEL: @load_step_not_affine(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_018:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[PTR1_017:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR4:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[PTR0_016:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[PTR0_016]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[PTR1_017]]
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_018]], 1
; CHECK-NEXT: [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR0_016]], i64 [[INC]]
; CHECK-NEXT: [[ADD_PTR4]] = getelementptr inbounds i8, i8* [[PTR1_017]], i64 [[INC]]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
br label %for.body
for.body:
%i.018 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
%ptr1.017 = phi i8* [ %add.ptr, %entry ], [ %add.ptr4, %for.inc ]
%ptr0.016 = phi i8* [ %ptr, %entry ], [ %add.ptr3, %for.inc ]
%v0 = load i8, i8* %ptr0.016
%v1 = load i8, i8* %ptr1.017
%cmp2 = icmp eq i8 %v0, %v1
br i1 %cmp2, label %for.inc, label %cleanup
for.inc:
%inc = add nuw nsw i64 %i.018, 1
%add.ptr3 = getelementptr inbounds i8, i8* %ptr0.016, i64 %inc
%add.ptr4 = getelementptr inbounds i8, i8* %ptr1.017, i64 %inc
%cmp = icmp ult i64 %inc, 16
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.inc ]
ret i1 %res
}
define i1 @no_overlap_between_loads(i8* %ptr) {
; CHECK-LABEL: @no_overlap_between_loads(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_016:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[PTR1_015:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR4:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[PTR0_014:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8* [[PTR0_014]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8* [[PTR1_015]]
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_016]], 1
; CHECK-NEXT: [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR0_014]], i64 2
; CHECK-NEXT: [[ADD_PTR4]] = getelementptr inbounds i8, i8* [[PTR1_015]], i64 2
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
br label %for.body
for.body:
%i.016 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
%ptr1.015 = phi i8* [ %add.ptr, %entry ], [ %add.ptr4, %for.inc ]
%ptr0.014 = phi i8* [ %ptr, %entry ], [ %add.ptr3, %for.inc ]
%v0 = load i8, i8* %ptr0.014
%v1 = load i8, i8* %ptr1.015
%cmp2 = icmp eq i8 %v0, %v1
br i1 %cmp2, label %for.inc, label %cleanup
for.inc:
%inc = add nuw nsw i64 %i.016, 1
%add.ptr3 = getelementptr inbounds i8, i8* %ptr0.014, i64 2
%add.ptr4 = getelementptr inbounds i8, i8* %ptr1.015, i64 2
%cmp = icmp ult i64 %inc, 16
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.inc ]
ret i1 %res
}
define i1 @volatile_loads(i8* %ptr) {
; CHECK-LABEL: @volatile_loads(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_016:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[PTR1_015:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR4:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[PTR0_014:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[V0:%.*]] = load volatile i8, i8* [[PTR0_014]]
; CHECK-NEXT: [[V1:%.*]] = load volatile i8, i8* [[PTR1_015]]
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_016]], 1
; CHECK-NEXT: [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR0_014]], i64 1
; CHECK-NEXT: [[ADD_PTR4]] = getelementptr inbounds i8, i8* [[PTR1_015]], i64 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
br label %for.body
for.body:
%i.016 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
%ptr1.015 = phi i8* [ %add.ptr, %entry ], [ %add.ptr4, %for.inc ]
%ptr0.014 = phi i8* [ %ptr, %entry ], [ %add.ptr3, %for.inc ]
%v0 = load volatile i8, i8* %ptr0.014
%v1 = load volatile i8, i8* %ptr1.015
%cmp2 = icmp eq i8 %v0, %v1
br i1 %cmp2, label %for.inc, label %cleanup
for.inc:
%inc = add nuw nsw i64 %i.016, 1
%add.ptr3 = getelementptr inbounds i8, i8* %ptr0.014, i64 1
%add.ptr4 = getelementptr inbounds i8, i8* %ptr1.015, i64 1
%cmp = icmp ult i64 %inc, 16
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.inc ]
ret i1 %res
}
define i1 @atomic_loads(i8* %ptr) {
; CHECK-LABEL: @atomic_loads(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8* [[PTR:%.*]], i64 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_016:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[PTR1_015:%.*]] = phi i8* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR4:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[PTR0_014:%.*]] = phi i8* [ [[PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[V0:%.*]] = load atomic i8, i8* [[PTR0_014]] unordered, align 1
; CHECK-NEXT: [[V1:%.*]] = load atomic i8, i8* [[PTR1_015]] unordered, align 1
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_016]], 1
; CHECK-NEXT: [[ADD_PTR3]] = getelementptr inbounds i8, i8* [[PTR0_014]], i64 1
; CHECK-NEXT: [[ADD_PTR4]] = getelementptr inbounds i8, i8* [[PTR1_015]], i64 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%add.ptr = getelementptr inbounds i8, i8* %ptr, i64 8
br label %for.body
for.body:
%i.016 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
%ptr1.015 = phi i8* [ %add.ptr, %entry ], [ %add.ptr4, %for.inc ]
%ptr0.014 = phi i8* [ %ptr, %entry ], [ %add.ptr3, %for.inc ]
%v0 = load atomic i8, i8* %ptr0.014 unordered, align 1
%v1 = load atomic i8, i8* %ptr1.015 unordered, align 1
%cmp2 = icmp eq i8 %v0, %v1
br i1 %cmp2, label %for.inc, label %cleanup
for.inc:
%inc = add nuw nsw i64 %i.016, 1
%add.ptr3 = getelementptr inbounds i8, i8* %ptr0.014, i64 1
%add.ptr4 = getelementptr inbounds i8, i8* %ptr1.015, i64 1
%cmp = icmp ult i64 %inc, 16
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.inc ]
ret i1 %res
}
define i1 @address_space(i8 addrspace(1)* %ptr) {
; CHECK-LABEL: @address_space(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, i8 addrspace(1)* [[PTR:%.*]], i64 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_016:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT: [[PTR1_015:%.*]] = phi i8 addrspace(1)* [ [[ADD_PTR]], [[ENTRY]] ], [ [[ADD_PTR4:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[PTR0_014:%.*]] = phi i8 addrspace(1)* [ [[PTR]], [[ENTRY]] ], [ [[ADD_PTR3:%.*]], [[FOR_INC]] ]
; CHECK-NEXT: [[V0:%.*]] = load i8, i8 addrspace(1)* [[PTR0_014]]
; CHECK-NEXT: [[V1:%.*]] = load i8, i8 addrspace(1)* [[PTR1_015]]
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i8 [[V0]], [[V1]]
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_INC]], label [[CLEANUP:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_016]], 1
; CHECK-NEXT: [[ADD_PTR3]] = getelementptr inbounds i8, i8 addrspace(1)* [[PTR0_014]], i64 1
; CHECK-NEXT: [[ADD_PTR4]] = getelementptr inbounds i8, i8 addrspace(1)* [[PTR1_015]], i64 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RES:%.*]] = phi i1 [ false, [[FOR_BODY]] ], [ true, [[FOR_INC]] ]
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%add.ptr = getelementptr inbounds i8, i8 addrspace(1)* %ptr, i64 8
br label %for.body
for.body:
%i.016 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
%ptr1.015 = phi i8 addrspace(1)* [ %add.ptr, %entry ], [ %add.ptr4, %for.inc ]
%ptr0.014 = phi i8 addrspace(1)* [ %ptr, %entry ], [ %add.ptr3, %for.inc ]
%v0 = load i8, i8 addrspace(1)* %ptr0.014
%v1 = load i8, i8 addrspace(1)* %ptr1.015
%cmp2 = icmp eq i8 %v0, %v1
br i1 %cmp2, label %for.inc, label %cleanup
for.inc:
%inc = add nuw nsw i64 %i.016, 1
%add.ptr3 = getelementptr inbounds i8, i8 addrspace(1)* %ptr0.014, i64 1
%add.ptr4 = getelementptr inbounds i8, i8 addrspace(1)* %ptr1.015, i64 1
%cmp = icmp ult i64 %inc, 16
br i1 %cmp, label %for.body, label %cleanup
cleanup:
%res = phi i1 [ false, %for.body ], [ true, %for.inc ]
ret i1 %res
}
; See https://bugs.llvm.org/show_bug.cgi?id=43206 for original reduced (but runnable) test:
;
; bool do_check(int i_max, int j_max, int**bptr, int* fillch) {
; for (int i = 0; i < i_max; i++)
; for (int j = 0; j < j_max; j++)
; if (bptr[i][j] != fillch[i])
; return 1;
; return 0;
; }
; The loads proceed differently here - fillch[i] changes once per outer loop,
; while bptr[i][j] changes both in inner loop, and in outer loop.
define i1 @pr43206_different_loops(i32 %i_max, i32 %j_max, i32** %bptr, i32* %fillch) {
; CHECK-LABEL: @pr43206_different_loops(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP31:%.*]] = icmp sgt i32 [[I_MAX:%.*]], 0
; CHECK-NEXT: [[CMP229:%.*]] = icmp sgt i32 [[J_MAX:%.*]], 0
; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[CMP31]], [[CMP229]]
; CHECK-NEXT: br i1 [[OR_COND]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]], label [[CLEANUP12:%.*]]
; CHECK: for.cond1.preheader.us.preheader:
; CHECK-NEXT: [[WIDE_TRIP_COUNT38:%.*]] = zext i32 [[I_MAX]] to i64
; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[J_MAX]] to i64
; CHECK-NEXT: br label [[FOR_COND1_PREHEADER_US:%.*]]
; CHECK: for.cond1.preheader.us:
; CHECK-NEXT: [[INDVARS_IV36:%.*]] = phi i64 [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ], [ [[INDVARS_IV_NEXT37:%.*]], [[FOR_COND1_FOR_INC10_CRIT_EDGE_US:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32*, i32** [[BPTR:%.*]], i64 [[INDVARS_IV36]]
; CHECK-NEXT: [[V0:%.*]] = load i32*, i32** [[ARRAYIDX_US]], align 8
; CHECK-NEXT: [[ARRAYIDX8_US:%.*]] = getelementptr inbounds i32, i32* [[FILLCH:%.*]], i64 [[INDVARS_IV36]]
; CHECK-NEXT: [[V1:%.*]] = load i32, i32* [[ARRAYIDX8_US]], align 4
; CHECK-NEXT: br label [[FOR_BODY4_US:%.*]]
; CHECK: for.cond1.us:
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT:%.*]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_COND1_FOR_INC10_CRIT_EDGE_US]], label [[FOR_BODY4_US]]
; CHECK: for.body4.us:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_COND1_PREHEADER_US]] ], [ [[INDVARS_IV_NEXT]], [[FOR_COND1_US:%.*]] ]
; CHECK-NEXT: [[ARRAYIDX6_US:%.*]] = getelementptr inbounds i32, i32* [[V0]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[V2:%.*]] = load i32, i32* [[ARRAYIDX6_US]], align 4
; CHECK-NEXT: [[CMP9_US:%.*]] = icmp eq i32 [[V2]], [[V1]]
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: br i1 [[CMP9_US]], label [[FOR_COND1_US]], label [[CLEANUP12_LOOPEXIT:%.*]]
; CHECK: for.cond1.for.inc10_crit_edge.us:
; CHECK-NEXT: [[INDVARS_IV_NEXT37]] = add nuw nsw i64 [[INDVARS_IV36]], 1
; CHECK-NEXT: [[EXITCOND39:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT37]], [[WIDE_TRIP_COUNT38]]
; CHECK-NEXT: br i1 [[EXITCOND39]], label [[CLEANUP12_LOOPEXIT1:%.*]], label [[FOR_COND1_PREHEADER_US]]
; CHECK: cleanup12.loopexit:
; CHECK-NEXT: br label [[CLEANUP12]]
; CHECK: cleanup12.loopexit1:
; CHECK-NEXT: br label [[CLEANUP12]]
; CHECK: cleanup12:
; CHECK-NEXT: [[V3:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ true, [[CLEANUP12_LOOPEXIT]] ], [ false, [[CLEANUP12_LOOPEXIT1]] ]
; CHECK-NEXT: ret i1 [[V3]]
;
entry:
%cmp31 = icmp sgt i32 %i_max, 0
%cmp229 = icmp sgt i32 %j_max, 0
%or.cond = and i1 %cmp31, %cmp229
br i1 %or.cond, label %for.cond1.preheader.us.preheader, label %cleanup12
for.cond1.preheader.us.preheader: ; preds = %entry
%wide.trip.count38 = zext i32 %i_max to i64
%wide.trip.count = zext i32 %j_max to i64
br label %for.cond1.preheader.us
for.cond1.preheader.us: ; preds = %for.cond1.for.inc10_crit_edge.us, %for.cond1.preheader.us.preheader
%indvars.iv36 = phi i64 [ 0, %for.cond1.preheader.us.preheader ], [ %indvars.iv.next37, %for.cond1.for.inc10_crit_edge.us ]
%arrayidx.us = getelementptr inbounds i32*, i32** %bptr, i64 %indvars.iv36
%v0 = load i32*, i32** %arrayidx.us, align 8
%arrayidx8.us = getelementptr inbounds i32, i32* %fillch, i64 %indvars.iv36
%v1 = load i32, i32* %arrayidx8.us, align 4
br label %for.body4.us
for.cond1.us: ; preds = %for.body4.us
%exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond, label %for.cond1.for.inc10_crit_edge.us, label %for.body4.us
for.body4.us: ; preds = %for.cond1.us, %for.cond1.preheader.us
%indvars.iv = phi i64 [ 0, %for.cond1.preheader.us ], [ %indvars.iv.next, %for.cond1.us ]
%arrayidx6.us = getelementptr inbounds i32, i32* %v0, i64 %indvars.iv
%v2 = load i32, i32* %arrayidx6.us, align 4
%cmp9.us = icmp eq i32 %v2, %v1
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
br i1 %cmp9.us, label %for.cond1.us, label %cleanup12
for.cond1.for.inc10_crit_edge.us: ; preds = %for.cond1.us
%indvars.iv.next37 = add nuw nsw i64 %indvars.iv36, 1
%exitcond39 = icmp eq i64 %indvars.iv.next37, %wide.trip.count38
br i1 %exitcond39, label %cleanup12, label %for.cond1.preheader.us
cleanup12: ; preds = %for.cond1.for.inc10_crit_edge.us, %for.body4.us, %entry
%v3 = phi i1 [ false, %entry ], [ true, %for.body4.us ], [ false, %for.cond1.for.inc10_crit_edge.us ]
ret i1 %v3
}
; From https://bugs.llvm.org/show_bug.cgi?id=43687
define void @body_always_branches_to_latch(i16* %a, i16* %b, i32) {
; CHECK-LABEL: @body_always_branches_to_latch(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BODY:%.*]]
; CHECK: body:
; CHECK-NEXT: [[A_DATA:%.*]] = load i16, i16* [[A:%.*]]
; CHECK-NEXT: [[B_DATA:%.*]] = load i16, i16* [[B:%.*]]
; CHECK-NEXT: [[COMPARED_EQUAL:%.*]] = icmp eq i16 [[A_DATA]], [[B_DATA]]
; CHECK-NEXT: br i1 [[COMPARED_EQUAL]], label [[LATCH:%.*]], label [[LATCH]]
; CHECK: latch:
; CHECK-NEXT: [[SHOULD_CONTINUE:%.*]] = icmp slt i32 undef, 79
; CHECK-NEXT: br i1 [[SHOULD_CONTINUE]], label [[BODY]], label [[END:%.*]]
; CHECK: end:
; CHECK-NEXT: ret void
;
entry:
br label %body
body: ; preds = %latch, %for.end1317
%a_data = load i16, i16* %a
%b_data = load i16, i16* %b
%compared_equal = icmp eq i16 %a_data, %b_data
br i1 %compared_equal, label %latch, label %latch
latch: ; preds = %body, %body
%should_continue = icmp slt i32 undef, 79
br i1 %should_continue, label %body, label %end
end: ; preds = %latch
ret void
}
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