https://bugs.llvm.org/show_bug.cgi?id=37713
Bug ID: 37713
Summary: InstCombine: stacksaverestore.ll looks different with
debug info present
Product: new-bugs
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: v...@apple.com
CC: llvm-bugs@lists.llvm.org
Running `opt -O1` on stacksaverestore.ll produces different output with/without
debug info present. To reproduce the issue, do:
# Baseline
$ $OPT -O1 test/Transforms/InstCombine/stacksaverestore.ll -S -o -
# With debug info
$ $OPT -O1 test/Transforms/InstCombine/stacksaverestore.ll -o - -debugify-each
-debugify-quiet | $OPT -strip -S
Comparing: -O1 test/Transforms/InstCombine/stacksaverestore.ll
Baseline: /var/folders/j8/t4w0bp8j6x1g6fpghkcb4sjm0000gp/T/tmp.P2vczKKB
With DI : /var/folders/j8/t4w0bp8j6x1g6fpghkcb4sjm0000gp/T/tmp.pcByPNQ1
12,16c12,18
< ; Function Attrs: norecurse nounwind readnone
< define noalias nonnull i32* @test1(i32) local_unnamed_addr #1 {
< %2 = zext i32 %0 to i64
< %3 = alloca i32, i64 %2, align 4
< ret i32* %3
---
> ; Function Attrs: nounwind
> define noalias nonnull i32* @test1(i32) local_unnamed_addr #0 {
> %2 = tail call i8* @llvm.stacksave()
> tail call void @llvm.stackrestore(i8* %2)
> %3 = zext i32 %0 to i64
> %4 = alloca i32, i64 %3, align 4
> ret i32* %4
:: Found a test case ^
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