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[SCCP] Test that constant propagation updates debug info, NFC 

This extends an existing test to check that SCCP updates the operands of
relevant dbg.value instructions as it does its work.

llvm-svn: 325281
This commit is contained in:
Vedant Kumar 2018-02-15 19:13:04 +00:00
parent 044b588929
commit 24953dc876
1 changed files with 17 additions and 5 deletions
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22
llvm/test/Transforms/SCCP/loadtest.ll
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@ -1,32 +1,44 @@
; This test makes sure that these instructions are properly constant propagated.
; RUN: opt < %s -data-layout="e-p:32:32" -sccp -S | FileCheck %s
; RUN: opt < %s -data-layout="E-p:32:32" -sccp -S | FileCheck %s
; CHECK-NOT: load
; RUN: opt < %s -data-layout="e-p:32:32" -debugify -sccp -S | FileCheck %s
; RUN: opt < %s -data-layout="E-p:32:32" -debugify -sccp -S | FileCheck %s
@X = constant i32 42 ; <i32*> [#uses=1]
@Y = constant [2 x { i32, float }] [ { i32, float } { i32 12, float 1.000000e+00 }, { i32, float } { i32 37, float 0x3FF3B2FEC0000000 } ] ; <[2 x { i32, float }]*> [#uses=2]
define i32 @test1() {
; CHECK-LABEL: @test1(
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 42
; CHECK-NEXT: ret
%B = load i32, i32* @X ; <i32> [#uses=1]
ret i32 %B
}
define float @test2() {
; CHECK-LABEL: @test2(
; CHECK-NEXT: call void @llvm.dbg.value(metadata float* getelementptr
; CHECK-NEXT: call void @llvm.dbg.value(metadata float 0x3FF3B2FEC0000000
; CHECK-NEXT: ret
%A = getelementptr [2 x { i32, float }], [2 x { i32, float }]* @Y, i64 0, i64 1, i32 1 ; <float*> [#uses=1]
%B = load float, float* %A ; <float> [#uses=1]
ret float %B
}
define i32 @test3() {
; CHECK-LABEL: @test3(
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32* getelementptr
; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 12
; CHECK-NEXT: ret
%A = getelementptr [2 x { i32, float }], [2 x { i32, float }]* @Y, i64 0, i64 0, i32 0 ; <i32*> [#uses=1]
%B = load i32, i32* %A
ret i32 %B
}
define i8 @test4() {
; CHECK-LABEL: @test4(
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8* bitcast
; CHECK-NEXT: call void @llvm.dbg.value(metadata i8
; CHECK-NEXT: ret
%A = bitcast i32* @X to i8*
%B = load i8, i8* %A
ret i8 %B