File: deterministic-scev-verify.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm-proposed-updates
  • size: 1,998,492 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (33 lines) | stat: -rw-r--r-- 819 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 
; RUN: opt -passes=indvars -S < %s | FileCheck %s

; Check that IndVarSimplify's result is not influenced by stray calls to
; ScalarEvolution in debug builds. However, -verify-passes=indvars may still do
; such calls.
; llvm.org/PR44815

; In this test, adding -verify-passes=indvars causes %tmp13 to not be optimized away.
; CHECK-LABEL: @foo
; CHECK-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, ptr @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
}