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[CodeGenPrepare] Pre-commit debug info test for optimizeSelectInst

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This test shows that optimizeSelectInst splits a select and sinks a
`fdiv` operation to one side of the diamond. However, the dbg.value for
the operation isn't moved.

llvm-svn: 340369
This commit is contained in:
Vedant Kumar 2018-08-21 23:42:53 +00:00
parent b5a8c81ac9
commit a5b0ee143f
1 changed files with 15 additions and 0 deletions
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15
test/Transforms/CodeGenPrepare/X86/select.ll
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@ -1,5 +1,6 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -codegenprepare -S < %s | FileCheck %s
; RUN: opt -debugify -codegenprepare -S < %s | FileCheck %s -check-prefix=DEBUG
target triple = "x86_64-unknown-unknown"
@ -35,6 +36,20 @@ define float @fdiv_true_sink(float %a, float %b) {
; CHECK-NEXT: [[SEL:%.*]] = phi float [ [[DIV]], [[SELECT_TRUE_SINK]] ], [ 2.000000e+00, [[ENTRY:%.*]] ]
; CHECK-NEXT: ret float [[SEL]]
;
; DEBUG-LABEL: @fdiv_true_sink(
; DEBUG-NEXT: entry:
; DEBUG-NEXT: call void @llvm.dbg.value(metadata float [[DIV:%[^,]+]]
; DEBUG-NEXT: [[CMP:%.*]] = fcmp ogt float [[A:%.*]], 1.000000e+00
; DEBUG-NEXT: call void @llvm.dbg.value(metadata i1 [[CMP]]
; DEBUG-NEXT: br i1 [[CMP]], label [[SELECT_TRUE_SINK:%.*]], label [[SELECT_END:%[^,]+]]
; DEBUG: select.true.sink:
; DEBUG-NEXT: [[DIV]] = fdiv float [[A]], [[B:%.*]]
; DEBUG-NEXT: br label [[SELECT_END]]
; DEBUG: select.end:
; DEBUG-NEXT: [[SEL:%.*]] = phi float [ [[DIV]], [[SELECT_TRUE_SINK]] ], [ 2.000000e+00, [[ENTRY:%.*]] ]
; DEBUG-NEXT: call void @llvm.dbg.value(metadata float [[SEL]]
; DEBUG-NEXT: ret float [[SEL]]
;
entry:
%div = fdiv float %a, %b
%cmp = fcmp ogt float %a, 1.0