File: restore-r30.ll

package info (click to toggle)
llvm-toolchain-7 1%3A7.0.1-8
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 733,456 kB
  • sloc: cpp: 3,776,651; ansic: 633,271; asm: 350,301; python: 142,716; objc: 107,612; sh: 22,626; lisp: 11,056; perl: 7,999; pascal: 6,742; ml: 5,537; awk: 3,536; makefile: 2,557; cs: 2,027; xml: 841; ruby: 156
file content (30 lines) | stat: -rw-r--r-- 998 bytes parent folder | download | duplicates (37)
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
; RUN: llc -relocation-model=pic < %s | FileCheck %s

; The load restoring r30 at the end of the function was placed out of order
; relative to its uses as the PIC base pointer.
; This was because the r30 operand was not marked as "def" which allowed
; the post-RA scheduler to move it over other uses of r30.

; CHECK-LABEL: fred
; CHECK:       lwz 30, 24(1)
; R30 should not appear in an instruction after it's been restored.
; CHECK-NOT:   30,

target datalayout = "E-m:e-p:32:32-i64:64-n32"
target triple = "powerpc--"

define double @fred(i64 %a) #0 {
entry:
  %0 = lshr i64 %a, 32
  %conv = trunc i64 %0 to i32
  %conv1 = sitofp i32 %conv to double
  %mul = fmul double %conv1, 0x41F0000000000000
  %and = and i64 %a, 4294967295
  %or = or i64 %and, 4841369599423283200
  %sub = fadd double %mul, 0xC330000000000000
  %1 = bitcast i64 %or to double
  %add = fadd double %sub, %1
  ret double %add
}

attributes #0 = { norecurse nounwind readnone "target-cpu"="ppc" "use-soft-float"="false" }