llvm-mirror/test/Transforms/LoopUnswitch/elseif-non-exponential-behavior.ll
Eric Christopher a62270de2c Revert "Temporarily Revert "Add basic loop fusion pass.""
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552
2019-04-17 04:52:47 +00:00

64 lines
2.5 KiB
LLVM

; RUN: opt -loop-unswitch -S - < %s | FileCheck %s
; RUN: opt -loop-unswitch -enable-mssa-loop-dependency=true -verify-memoryssa -S - < %s | FileCheck %s
;CHECK-LABEL: @b
;CHECK: [[Loop1:for\.end.*]]: ; preds = %for.cond.us
;CHECK-NEXT: %[[PhiVar1:pdt.*]] = phi i32 [ %pdt.0.us, %for.cond.us ]
;CHECK: [[Loop2:for\.end.*]]: ; preds = %for.cond.us1
;CHECK-NEXT: %[[PhiVar2:pdt.*]] = phi i32 [ %pdt.0.us2, %for.cond.us1 ]
;CHECK: [[Loop3:for\.end.*]]: ; preds = %for.cond
;CHECK-NEXT: %[[PhiVar3:pdt.*]] = phi i32 [ %pdt.0, %for.cond ]
;CHECK: [[Join1:for\.end.*]]: ; preds = %[[Loop2]], %[[Loop3]]
;CHECK-NEXT: %[[PhiRes1:pdt.*]] = phi i32 [ %[[PhiVar3]], %[[Loop3]] ], [ %[[PhiVar2]], %[[Loop2]] ]
;CHECK: for.end: ; preds = %[[Loop1]], %[[Join1]]
;CHECK-NEXT: %[[PhiRes2:pdt.*]] = phi i32 [ %[[PhiRes1]], %[[Join1]] ], [ %[[PhiVar1]], %[[Loop1]] ]
;CHECK-NEXT: ret i32 %[[PhiRes2]]
; Function Attrs: nounwind uwtable
define i32 @b(i32 %x, i32 %y) #0 {
entry:
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%pdt.0 = phi i32 [ 1, %entry ], [ %pdt.2, %for.inc ]
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%cmp = icmp slt i32 %i.0, 100
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%tobool = icmp ne i32 %x, 0
br i1 %tobool, label %if.then, label %if.else
if.then: ; preds = %for.body
%mul = mul nsw i32 %pdt.0, 2
br label %if.end6
if.else: ; preds = %for.body
%tobool1 = icmp ne i32 %y, 0
br i1 %tobool1, label %if.then2, label %if.else4
if.then2: ; preds = %if.else
%mul3 = mul nsw i32 %pdt.0, 3
br label %if.end
if.else4: ; preds = %if.else
%mul5 = mul nsw i32 %pdt.0, 4
br label %if.end
if.end: ; preds = %if.else4, %if.then2
%pdt.1 = phi i32 [ %mul3, %if.then2 ], [ %mul5, %if.else4 ]
br label %if.end6
if.end6: ; preds = %if.end, %if.then
%pdt.2 = phi i32 [ %mul, %if.then ], [ %pdt.1, %if.end ]
br label %for.inc
for.inc: ; preds = %if.end6
%inc = add nsw i32 %i.0, 1
br label %for.cond
for.end: ; preds = %for.cond
ret i32 %pdt.0
}