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
60 lines
1.3 KiB
LLVM
60 lines
1.3 KiB
LLVM
; RUN: opt -passes=newgvn -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64"
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; GVN should ignore the store to p[1] to see that the load from p[0] is
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; fully redundant.
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; CHECK-LABEL: @yes(
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; CHECK: if.then:
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; CHECK-NEXT: store i32 0, i32* %q
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; CHECK-NEXT: ret void
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define void @yes(i1 %c, i32* %p, i32* %q) nounwind {
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entry:
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store i32 0, i32* %p
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%p1 = getelementptr inbounds i32, i32* %p, i64 1
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store i32 1, i32* %p1
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br i1 %c, label %if.else, label %if.then
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if.then:
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%t = load i32, i32* %p
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store i32 %t, i32* %q
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ret void
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if.else:
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ret void
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}
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; GVN should ignore the store to p[1] to see that the first load from p[0] is
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; fully redundant. However, the second load is larger, so it's not a simple
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; redundancy.
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; CHECK-LABEL: @watch_out_for_size_change(
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; CHECK: if.then:
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; CHECK-NEXT: store i32 0, i32* %q
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; CHECK-NEXT: ret void
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; CHECK: if.else:
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; CHECK: load i64, i64* %pc
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; CHECK: store i64
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define void @watch_out_for_size_change(i1 %c, i32* %p, i32* %q) nounwind {
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entry:
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store i32 0, i32* %p
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%p1 = getelementptr inbounds i32, i32* %p, i64 1
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store i32 1, i32* %p1
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br i1 %c, label %if.else, label %if.then
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if.then:
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%t = load i32, i32* %p
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store i32 %t, i32* %q
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ret void
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if.else:
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%pc = bitcast i32* %p to i64*
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%qc = bitcast i32* %q to i64*
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%t64 = load i64, i64* %pc
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store i64 %t64, i64* %qc
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ret void
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}
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