File: coalesce-ext.ll

package info (click to toggle)
llvm-toolchain-9 1%3A9.0.1-16
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 882,436 kB
  • sloc: cpp: 4,167,636; ansic: 714,256; asm: 457,610; python: 155,927; objc: 65,094; sh: 42,856; lisp: 26,908; perl: 7,786; pascal: 7,722; makefile: 6,881; ml: 5,581; awk: 3,648; cs: 2,027; xml: 888; javascript: 381; ruby: 156
file content (18 lines) | stat: -rw-r--r-- 692 bytes parent folder | download | duplicates (11) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
 
; RUN: llc -verify-machineinstrs -mcpu=g5 -mtriple=powerpc64-unknown-linux-gnu -ppc-asm-full-reg-names < %s | FileCheck %s
; Check that the peephole optimizer knows about sext and zext instructions.
; CHECK: test1sext
define i32 @test1sext(i64 %A, i64 %B, i32* %P, i64 *%P2) nounwind {
  %C = add i64 %A, %B
  ; CHECK: add [[SUM:r[0-9]+]], r3, r4
  %D = trunc i64 %C to i32
  %E = shl i64 %C, 32
  %F = ashr i64 %E, 32
  ; CHECK: extsw [[EXT:r[0-9]+]], [[SUM]]
  store volatile i64 %F, i64 *%P2
  ; CHECK-DAG: std [[EXT]]
  store volatile i32 %D, i32* %P
  ; Reuse low bits of extended register, don't extend live range of SUM.
  ; CHECK-DAG: stw [[SUM]]
  %R = add i32 %D, %D
  ret i32 %R
}