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