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https://github.com/RPCS3/llvm-mirror.git
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202bb919c0
If we don't know anything about the alignment of a pointer, Align(1) is still correct: all pointers are at least 1-byte aligned. Included in this patch is a bugfix for an issue discovered during this cleanup: pointers with "dereferenceable" attributes/metadata were assumed to be aligned according to the type of the pointer. This wasn't intentional, as far as I can tell, so Loads.cpp was fixed to stop making this assumption. Frontends may need to be updated. I updated clang's handling of C++ references, and added a release note for this. Differential Revision: https://reviews.llvm.org/D80072
181 lines
6.7 KiB
LLVM
181 lines
6.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -simplifycfg -phi-node-folding-threshold=2 -S | FileCheck %s
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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-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @test1(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T1:%.*]] = icmp eq i32 [[B:%.*]], 0
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; CHECK-NEXT: [[T2:%.*]] = icmp sgt i32 [[C:%.*]], 1
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; CHECK-NEXT: [[T3:%.*]] = add i32 [[A:%.*]], 1
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[T2]], i32 [[T3]], i32 [[A]]
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; CHECK-NEXT: [[T4:%.*]] = select i1 [[T1]], i32 [[SPEC_SELECT]], i32 [[B]]
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; CHECK-NEXT: [[T5:%.*]] = sub i32 [[T4]], 1
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; CHECK-NEXT: ret i32 [[T5]]
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;
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entry:
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%t1 = icmp eq i32 %b, 0
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br i1 %t1, label %bb1, label %bb3
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bb1:
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%t2 = icmp sgt i32 %c, 1
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br i1 %t2, label %bb2, label %bb3
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bb2:
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%t3 = add i32 %a, 1
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br label %bb3
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bb3:
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%t4 = phi i32 [ %b, %entry ], [ %a, %bb1 ], [ %t3, %bb2 ]
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%t5 = sub i32 %t4, 1
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ret i32 %t5
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}
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define float @spec_select_fp1(float %a, float %b, float %c) {
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; CHECK-LABEL: @spec_select_fp1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T1:%.*]] = fcmp oeq float [[B:%.*]], 0.000000e+00
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; CHECK-NEXT: br i1 [[T1]], label [[BB1:%.*]], label [[BB3:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[T2:%.*]] = fcmp ogt float [[C:%.*]], 1.000000e+00
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; CHECK-NEXT: br i1 [[T2]], label [[BB2:%.*]], label [[BB3]]
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; CHECK: bb2:
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; CHECK-NEXT: [[T3:%.*]] = fadd float [[A:%.*]], 1.000000e+00
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[T4:%.*]] = phi ninf float [ [[B]], [[ENTRY:%.*]] ], [ [[A]], [[BB1]] ], [ [[T3]], [[BB2]] ]
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; CHECK-NEXT: [[T5:%.*]] = fsub float [[T4]], 1.000000e+00
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; CHECK-NEXT: ret float [[T5]]
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;
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entry:
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%t1 = fcmp oeq float %b, 0.0
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br i1 %t1, label %bb1, label %bb3
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bb1:
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%t2 = fcmp ogt float %c, 1.0
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br i1 %t2, label %bb2, label %bb3
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bb2:
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%t3 = fadd float %a, 1.0
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br label %bb3
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bb3:
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%t4 = phi ninf float [ %b, %entry ], [ %a, %bb1 ], [ %t3, %bb2 ]
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%t5 = fsub float %t4, 1.0
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ret float %t5
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}
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define i8* @test4(i1* %dummy, i8* %a, i8* %b) {
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; Test that we don't speculate an arbitrarily large number of unfolded constant
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; expressions.
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[COND1:%.*]] = load volatile i1, i1* [[DUMMY:%.*]]
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; CHECK-NEXT: br i1 [[COND1]], label [[IF:%.*]], label [[END:%.*]]
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; CHECK: if:
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; CHECK-NEXT: [[COND2:%.*]] = load volatile i1, i1* [[DUMMY]]
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; CHECK-NEXT: br i1 [[COND2]], label [[THEN:%.*]], label [[END]]
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; CHECK: then:
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: [[X1:%.*]] = phi i8* [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[B:%.*]], [[IF]] ], [ inttoptr (i64 1 to i8*), [[THEN]] ]
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; CHECK-NEXT: [[X2:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 2 to i8*), [[THEN]] ]
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; CHECK-NEXT: [[X3:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 3 to i8*), [[THEN]] ]
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; CHECK-NEXT: [[X4:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 4 to i8*), [[THEN]] ]
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; CHECK-NEXT: [[X5:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 5 to i8*), [[THEN]] ]
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; CHECK-NEXT: [[X6:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 6 to i8*), [[THEN]] ]
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; CHECK-NEXT: [[X7:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 7 to i8*), [[THEN]] ]
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; CHECK-NEXT: [[X8:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 8 to i8*), [[THEN]] ]
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; CHECK-NEXT: [[X9:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 9 to i8*), [[THEN]] ]
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; CHECK-NEXT: [[X10:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 10 to i8*), [[THEN]] ]
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; CHECK-NEXT: ret i8* [[X10]]
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;
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entry:
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%cond1 = load volatile i1, i1* %dummy
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br i1 %cond1, label %if, label %end
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if:
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%cond2 = load volatile i1, i1* %dummy
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br i1 %cond2, label %then, label %end
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then:
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br label %end
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end:
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%x1 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 1 to i8*), %then ]
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%x2 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 2 to i8*), %then ]
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%x3 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 3 to i8*), %then ]
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%x4 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 4 to i8*), %then ]
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%x5 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 5 to i8*), %then ]
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%x6 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 6 to i8*), %then ]
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%x7 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 7 to i8*), %then ]
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%x8 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 8 to i8*), %then ]
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%x9 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 9 to i8*), %then ]
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%x10 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 10 to i8*), %then ]
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ret i8* %x10
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}
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define i32* @test5(i32 %a, i32 %b, i32 %c, i32* dereferenceable(10) %ptr1, i32* dereferenceable(10) %ptr2, i32** dereferenceable(10) align 8 %ptr3) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T1:%.*]] = icmp eq i32 [[B:%.*]], 0
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; CHECK-NEXT: br i1 [[T1]], label [[BB1:%.*]], label [[BB3:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[T2:%.*]] = icmp sgt i32 [[C:%.*]], 1
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; CHECK-NEXT: [[T3:%.*]] = load i32*, i32** [[PTR3:%.*]]
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[T2]], i32* [[T3]], i32* [[PTR2:%.*]]
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; CHECK-NEXT: ret i32* [[SPEC_SELECT]]
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; CHECK: bb3:
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; CHECK-NEXT: ret i32* [[PTR1:%.*]]
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;
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entry:
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%t1 = icmp eq i32 %b, 0
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br i1 %t1, label %bb1, label %bb3
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bb1:
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%t2 = icmp sgt i32 %c, 1
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br i1 %t2, label %bb2, label %bb3
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bb2:
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%t3 = load i32*, i32** %ptr3, !dereferenceable !{i64 10}
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br label %bb3
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bb3:
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%t4 = phi i32* [ %ptr1, %entry ], [ %ptr2, %bb1 ], [ %t3, %bb2 ]
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ret i32* %t4
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}
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define float @spec_select_fp5(float %a, float %b, float %c) {
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; CHECK-LABEL: @spec_select_fp5(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[T1:%.*]] = fcmp oeq float [[B:%.*]], 0.000000e+00
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; CHECK-NEXT: br i1 [[T1]], label [[BB1:%.*]], label [[BB3:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[T2:%.*]] = fcmp ogt float [[C:%.*]], 1.000000e+00
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; CHECK-NEXT: br i1 [[T2]], label [[BB2:%.*]], label [[BB3]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[T4:%.*]] = phi nsz float [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[B]], [[BB1]] ], [ [[C]], [[BB2]] ]
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; CHECK-NEXT: ret float [[T4]]
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;
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entry:
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%t1 = fcmp oeq float %b, 0.0
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br i1 %t1, label %bb1, label %bb3
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bb1:
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%t2 = fcmp ogt float %c, 1.0
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br i1 %t2, label %bb2, label %bb3
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bb2:
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br label %bb3
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bb3:
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%t4 = phi nsz float [ %a, %entry ], [ %b, %bb1 ], [ %c, %bb2 ]
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ret float %t4
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}
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