File: peephole-bitcast.ll

package info (click to toggle)
llvm-toolchain-snapshot 1%3A22~%2B%2B20250731080150%2Bbe449d6b6587-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,250,472 kB
  • sloc: cpp: 7,641,756; ansic: 1,439,220; asm: 1,072,591; python: 253,178; f90: 95,173; objc: 70,722; lisp: 44,365; pascal: 18,720; sh: 10,051; ml: 5,111; perl: 4,720; awk: 3,523; makefile: 3,397; javascript: 2,272; xml: 892; fortran: 783
file content (31 lines) | stat: -rw-r--r-- 886 bytes parent folder | download | duplicates (25) 
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
 
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=arm-- -mcpu=cortex-a8 | FileCheck %s

; Check that the peepholer removes dead instructions:
;
;   vmov s0, r0
;   vmov r0, s0

define void @t(float %x) nounwind ssp {
; CHECK-LABEL: t:
; CHECK:       @ %bb.0: @ %entry
; CHECK-NEXT:    movw r1, #65534
; CHECK-NEXT:    movt r1, #32639
; CHECK-NEXT:    cmp r0, r1
; CHECK-NEXT:    bxhi lr
; CHECK-NEXT:  .LBB0_1: @ %if.then
; CHECK-NEXT:    b doSomething
entry:
  %0 = bitcast float %x to i32
  %cmp = icmp ult i32 %0, 2139095039
  br i1 %cmp, label %if.then, label %if.end

if.then:                                          ; preds = %entry
  tail call void @doSomething(float %x) nounwind
  br label %if.end

if.end:                                           ; preds = %if.then, %entry
  ret void
}

declare void @doSomething(float)