9d172c8e9c
This switches to using DSE + MemorySSA by default again, after fixing the issues reported after the first commit. Notable fixes fc8200633122, a0017c2bc258. This reverts commit 3a59628f3cc26eb085acfc9cbdc97243ef71a6c5.
87 lines
3.1 KiB
LLVM
87 lines
3.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; REQUIRES: asserts
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; Eliminates store to %R in the entry block.
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; RUN: opt < %s -basic-aa -dse -debug-counter=dse-memoryssa-skip=0,dse-memoryssa-count=1 -S | FileCheck --check-prefix=SKIP0-COUNT1 %s
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; Eliminates store to %P in the entry block.
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; RUN: opt < %s -basic-aa -dse -debug-counter=dse-memoryssa-skip=1,dse-memoryssa-count=1 -S | FileCheck --check-prefix=SKIP1-COUNT1 %s
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; Eliminates both stores in the entry block.
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; RUN: opt < %s -basic-aa -dse -debug-counter=dse-memoryssa-skip=0,dse-memoryssa-count=2 -S | FileCheck --check-prefix=SKIP0-COUNT2 %s
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; Eliminates no stores.
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; RUN: opt < %s -basic-aa -dse -debug-counter=dse-memoryssa-skip=2,dse-memoryssa-count=1 -S | FileCheck --check-prefix=SKIP2-COUNT1 %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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define void @test(i32* noalias %P, i32* noalias %Q, i32* noalias %R) {
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; SKIP0-COUNT1-LABEL: @test(
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; SKIP0-COUNT1-NEXT: store i32 1, i32* [[P:%.*]]
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; SKIP0-COUNT1-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
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; SKIP0-COUNT1: bb1:
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; SKIP0-COUNT1-NEXT: br label [[BB3:%.*]]
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; SKIP0-COUNT1: bb2:
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; SKIP0-COUNT1-NEXT: br label [[BB3]]
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; SKIP0-COUNT1: bb3:
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; SKIP0-COUNT1-NEXT: store i32 0, i32* [[Q:%.*]]
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; SKIP0-COUNT1-NEXT: store i32 0, i32* [[R:%.*]]
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; SKIP0-COUNT1-NEXT: store i32 0, i32* [[P]]
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; SKIP0-COUNT1-NEXT: ret void
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;
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; SKIP1-COUNT1-LABEL: @test(
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; SKIP1-COUNT1-NEXT: store i32 1, i32* [[R:%.*]]
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; SKIP1-COUNT1-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
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; SKIP1-COUNT1: bb1:
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; SKIP1-COUNT1-NEXT: br label [[BB3:%.*]]
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; SKIP1-COUNT1: bb2:
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; SKIP1-COUNT1-NEXT: br label [[BB3]]
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; SKIP1-COUNT1: bb3:
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; SKIP1-COUNT1-NEXT: store i32 0, i32* [[Q:%.*]]
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; SKIP1-COUNT1-NEXT: store i32 0, i32* [[R]]
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; SKIP1-COUNT1-NEXT: store i32 0, i32* [[P:%.*]]
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; SKIP1-COUNT1-NEXT: ret void
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;
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; SKIP0-COUNT2-LABEL: @test(
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; SKIP0-COUNT2-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
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; SKIP0-COUNT2: bb1:
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; SKIP0-COUNT2-NEXT: br label [[BB3:%.*]]
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; SKIP0-COUNT2: bb2:
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; SKIP0-COUNT2-NEXT: br label [[BB3]]
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; SKIP0-COUNT2: bb3:
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; SKIP0-COUNT2-NEXT: store i32 0, i32* [[Q:%.*]]
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; SKIP0-COUNT2-NEXT: store i32 0, i32* [[R:%.*]]
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; SKIP0-COUNT2-NEXT: store i32 0, i32* [[P:%.*]]
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; SKIP0-COUNT2-NEXT: ret void
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;
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; SKIP2-COUNT1-LABEL: @test(
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; SKIP2-COUNT1-NEXT: store i32 1, i32* [[P:%.*]]
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; SKIP2-COUNT1-NEXT: store i32 1, i32* [[R:%.*]]
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; SKIP2-COUNT1-NEXT: br i1 true, label [[BB1:%.*]], label [[BB2:%.*]]
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; SKIP2-COUNT1: bb1:
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; SKIP2-COUNT1-NEXT: br label [[BB3:%.*]]
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; SKIP2-COUNT1: bb2:
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; SKIP2-COUNT1-NEXT: br label [[BB3]]
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; SKIP2-COUNT1: bb3:
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; SKIP2-COUNT1-NEXT: store i32 0, i32* [[Q:%.*]]
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; SKIP2-COUNT1-NEXT: store i32 0, i32* [[R]]
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; SKIP2-COUNT1-NEXT: store i32 0, i32* [[P]]
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; SKIP2-COUNT1-NEXT: ret void
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;
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store i32 1, i32* %P
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store i32 1, i32* %R
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br i1 true, label %bb1, label %bb2
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bb1:
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br label %bb3
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bb2:
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br label %bb3
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bb3:
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store i32 0, i32* %Q
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store i32 0, i32* %R
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store i32 0, i32* %P
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ret void
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}
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