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[DSE,MSSA] Adjust mda-with-dbg-values.ll to MSSA backed DSE. 

-memdep-block-scan-limit is not relevant with MSSA.
This commit is contained in:
Florian Hahn 2020-02-10 15:18:46 +00:00
parent fddacd00fc
commit 74f03e4ff0
1 changed files with 12 additions and 8 deletions
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20
llvm/test/Transforms/DeadStoreElimination/MSSA/mda-with-dbg-values.ll
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@ -1,13 +1,12 @@
; RUN: opt -S -dse -enable-dse-memoryssa -memdep-block-scan-limit=3 < %s | FileCheck %s
; RUN: opt -S -strip-debug -dse -enable-dse-memoryssa -memdep-block-scan-limit=3 < %s | FileCheck %s
; RUN: opt -S -dse -enable-dse-memoryssa -dse-memoryssa-scanlimit=2 < %s | FileCheck %s
; RUN: opt -S -strip-debug -dse -enable-dse-memoryssa -dse-memoryssa-scanlimit=2 < %s | FileCheck %s
; Test case to check that the memory dependency analysis gets the same
; result even if we have a dbg value between the memcpy and
; store. The memory dependency is then used by DSE to remove the store.
; Test case to check that DSE gets the same result even if we have a dbg value
; between the memcpy.
; We use -memdep-block-scan-limit=3 to be able to create a small test case.
; Without it, we would need to squeeze in 100 instructions since the default
; limit is 100.
; This test case is less relevant for the MemorySSA backed version of DSE, as
; debug values are not modeled in MemorySSA and are skipped regardless of the
; exploration limit.
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@ -20,6 +19,11 @@ entry:
%i = alloca i8, align 1
store i8 1, i8* %i, align 1, !dbg !19
call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !17, metadata !DIExpression()), !dbg !18
call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !17, metadata !DIExpression()), !dbg !18
call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !17, metadata !DIExpression()), !dbg !18
call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !17, metadata !DIExpression()), !dbg !18
call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !17, metadata !DIExpression()), !dbg !18
call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !17, metadata !DIExpression()), !dbg !18
%0 = bitcast [1 x i8]* @g to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %i, i8* %0, i64 1, i1 false), !dbg !20
br label %bb2