File: select-gep.ll

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (26 lines) | stat: -rw-r--r-- 826 bytes parent folder | download | duplicates (7) 
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
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s

%ST = type { i8, i8 }

define i8* @test1(%ST* %x, i8* %y) nounwind {
; CHECK-LABEL: @test1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq %ST* [[X:%.*]], null
; CHECK-NEXT:    [[INCDEC_PTR:%.*]] = getelementptr [[ST:%.*]], %ST* [[X]], i32 0, i32 1
; CHECK-NEXT:    [[INCDEC_PTR_Y:%.*]] = select i1 [[CMP]], i8* [[INCDEC_PTR]], i8* [[Y:%.*]]
; CHECK-NEXT:    ret i8* [[INCDEC_PTR_Y]]
;
entry:
  %cmp = icmp eq %ST* %x, null
  br i1 %cmp, label %if.then, label %if.end

if.then:
  %incdec.ptr = getelementptr %ST, %ST* %x, i32 0, i32 1
  br label %if.end

if.end:
  %x.addr = phi i8* [ %incdec.ptr, %if.then ], [ %y, %entry ]
  ret i8* %x.addr

}