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NewGVN: We pass rle-nonlocal, we just perform the replacement in a way that keeps the old name instead of the new one 

llvm-svn: 297683
This commit is contained in:
Daniel Berlin 2017-03-13 22:43:30 +00:00
parent bf19d4bc29
commit 2aa23e8881
1 changed files with 22 additions and 8 deletions
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30
llvm/test/Transforms/NewGVN/rle-nonlocal.ll
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@ -1,23 +1,37 @@
; XFAIL: *
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s
define i32 @main(i32** %p, i32 %x, i32 %y) {
; CHECK-LABEL: @main(
; CHECK-NEXT: block1:
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[BLOCK2:%.*]], label [[BLOCK3:%.*]]
; CHECK: block2:
; CHECK-NEXT: [[A:%.*]] = load i32*, i32** [[P:%.*]]
; CHECK-NEXT: br label [[BLOCK4:%.*]]
; CHECK: block3:
; CHECK-NEXT: [[B:%.*]] = load i32*, i32** [[P]]
; CHECK-NEXT: br label [[BLOCK4]]
; CHECK: block4:
; CHECK-NEXT: [[EXISTINGPHI:%.*]] = phi i32* [ [[A]], [[BLOCK2]] ], [ [[B]], [[BLOCK3]] ]
; CHECK-NEXT: [[C:%.*]] = load i32, i32* [[EXISTINGPHI]]
; CHECK-NEXT: [[E:%.*]] = add i32 [[C]], [[C]]
; CHECK-NEXT: ret i32 [[E]]
;
block1:
%cmp = icmp eq i32 %x, %y
br i1 %cmp , label %block2, label %block3
%cmp = icmp eq i32 %x, %y
br i1 %cmp , label %block2, label %block3
block2:
%a = load i32*, i32** %p
br label %block4
%a = load i32*, i32** %p
br label %block4
block3:
%b = load i32*, i32** %p
br label %block4
block4:
; CHECK-NOT: %existingPHI = phi
; CHECK: %DEAD = phi
%existingPHI = phi i32* [ %a, %block2 ], [ %b, %block3 ]
%existingPHI = phi i32* [ %a, %block2 ], [ %b, %block3 ]
%DEAD = load i32*, i32** %p
%c = load i32, i32* %DEAD
%d = load i32, i32* %existingPHI