39 lines
1.1 KiB
LLVM
39 lines
1.1 KiB
LLVM
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; RUN: opt -indvars -stats -disable-output < %s 2>&1 | FileCheck %s --check-prefix=STATS
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; RUN: opt -indvars -S < %s | FileCheck %s --check-prefix=IR
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; REQUIRES: asserts
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; Check that IndVarSimplify's result is not influenced by stray calls to
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; ScalarEvolution in debug builds. However, -verify-indvars may still do
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; such calls.
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; llvm.org/PR44815
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; STATS: 1 scalar-evolution - Number of loops with trip counts computed by force
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; STATS: 2 scalar-evolution - Number of loops with predictable loop counts
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; In this test, adding -verify-indvars causes %tmp13 to not be optimized away.
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; IR-LABEL: @foo
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; IR-NOT: phi i32
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target triple = "x86_64-unknown-linux-gnu"
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@b = external dso_local local_unnamed_addr global i32
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define dso_local void @foo() {
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tmp0:
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br label %tmp12
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tmp7:
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%tmp8 = add nuw nsw i32 %tmp13, 1
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store i32 undef, i32* @b
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br label %tmp12
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tmp12:
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%tmp13 = phi i32 [ 2, %tmp0 ], [ %tmp8, %tmp7 ]
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%tmp14 = phi i32 [ 1, %tmp0 ], [ %tmp13, %tmp7 ]
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%tmp15 = icmp ult i32 %tmp14, undef
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br i1 %tmp15, label %tmp7, label %tmp16
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tmp16:
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ret void
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}
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