bcdcf984cc
This updates NewGVN test cases that were running "opt -basic-aa -newgvn ..." to run "opt -passes=newgvn ..." instead. The pipeline will be more similar to what we used to have with legacy PM by doing it this way. The compatility mode that we've been using for awhile during transition from legacy PM to new PM, i.e. using the legacy syntax together with new PM, has resulted in a pipeline such as -passes='function(require<basic-aa>),function(newgvn)' but running the analysis in a separate function pass manager seem overly complicated for these tests. Another difference is that we will get the default aa-pipeline instead of only running basic-aa. That might be a bit questioned (given that the tests originally specified basic-aa). The output is however identival for all the test cases modified here regardless of using basic-aa or the default aa-pipeline. This is also another small step towards removal of the support for using the legacy PM syntax in opt. Differential Revision: https://reviews.llvm.org/D118340
80 lines
2.6 KiB
LLVM
80 lines
2.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=newgvn -S | FileCheck %s
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;; Most of these are borrowed from transforms/DSE/simple.ll
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;; NewGVN should be able to eliminate any stores of the same value that are actually redundnat.
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;; tmp5 is store of the same value to the same location as the load.
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define void @test12({ i32, i32 }* %x) nounwind {
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; CHECK-LABEL: @test12(
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; CHECK-NEXT: [[TMP4:%.*]] = getelementptr { i32, i32 }, { i32, i32 }* [[X:%.*]], i32 0, i32 0
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; CHECK-NEXT: [[TMP5:%.*]] = load i32, i32* [[TMP4]], align 4
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; CHECK-NEXT: [[TMP7:%.*]] = getelementptr { i32, i32 }, { i32, i32 }* [[X]], i32 0, i32 1
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; CHECK-NEXT: [[TMP8:%.*]] = load i32, i32* [[TMP7]], align 4
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; CHECK-NEXT: [[TMP17:%.*]] = sub i32 0, [[TMP8]]
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; CHECK-NEXT: store i32 [[TMP17]], i32* [[TMP7]], align 4
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; CHECK-NEXT: ret void
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;
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%tmp4 = getelementptr { i32, i32 }, { i32, i32 }* %x, i32 0, i32 0
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%tmp5 = load i32, i32* %tmp4, align 4
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%tmp7 = getelementptr { i32, i32 }, { i32, i32 }* %x, i32 0, i32 1
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%tmp8 = load i32, i32* %tmp7, align 4
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%tmp17 = sub i32 0, %tmp8
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store i32 %tmp5, i32* %tmp4, align 4
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store i32 %tmp17, i32* %tmp7, align 4
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ret void
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}
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; Remove redundant store if loaded value is in another block.
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define i32 @test26(i1 %c, i32* %p) {
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; CHECK-LABEL: @test26(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P:%.*]], align 4
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; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[BB3:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%v = load i32, i32* %p, align 4
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br i1 %c, 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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store i32 %v, i32* %p, align 4
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br label %bb3
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bb3:
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ret i32 0
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}
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declare void @unknown_func()
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; Remove redundant store, which is in the same loop as the load.
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define i32 @test33(i1 %c, i32* %p, i32 %i) {
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; CHECK-LABEL: @test33(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[BB1:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P:%.*]], align 4
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; CHECK-NEXT: br label [[BB2:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: call void @unknown_func()
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; CHECK-NEXT: br i1 undef, label [[BB1]], label [[BB3:%.*]]
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; CHECK: bb3:
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; CHECK-NEXT: ret i32 0
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;
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entry:
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br label %bb1
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bb1:
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%v = load i32, i32* %p, align 4
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br label %bb2
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bb2:
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store i32 %v, i32* %p, align 4
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; Might read and overwrite value at %p, but doesn't matter.
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call void @unknown_func()
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br i1 undef, label %bb1, label %bb3
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bb3:
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ret i32 0
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}
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