File: 2008-02-20-InlineAsmClobber.ll

package info (click to toggle)
llvm-toolchain-6.0 1%3A6.0.1-10
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 598,080 kB
  • sloc: cpp: 3,046,253; ansic: 595,057; asm: 271,965; python: 128,926; objc: 106,554; sh: 21,906; lisp: 10,191; pascal: 6,094; ml: 5,544; perl: 5,265; makefile: 2,227; cs: 2,027; xml: 686; php: 212; csh: 117
file content (30 lines) | stat: -rw-r--r-- 1,086 bytes parent folder | download | duplicates (19)
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 -no-integrated-as < %s | FileCheck %s
; PR2078
; The clobber list says that "ax" is clobbered.  Make sure that eax isn't 
; allocated to the input/output register.
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin8"
@pixels = weak global i32 0		; <i32*> [#uses=2]

define void @test() nounwind  {
entry:
	%tmp = load i32, i32* @pixels, align 4		; <i32> [#uses=1]
	%tmp1 = tail call i32 asm sideeffect "a: $0 $1", "=r,0,~{dirflag},~{fpsr},~{flags},~{ax}"( i32 %tmp ) nounwind 		; <i32> [#uses=1]
	store i32 %tmp1, i32* @pixels, align 4
	ret void
}

; CHECK: a:
; CHECK-NOT: ax
; CHECK: {{$}}

define void @test2(i16* %block, i8* %pixels, i32 %line_size) nounwind  {
entry:
	%tmp1 = getelementptr i16, i16* %block, i32 64		; <i16*> [#uses=1]
	%tmp3 = tail call i8* asm sideeffect "b: $0 $1 $2", "=r,r,0,~{dirflag},~{fpsr},~{flags},~{ax}"( i16* %tmp1, i8* %pixels ) nounwind 		; <i8*> [#uses=0]
	ret void
}

; CHECK: b:
; CHECK-NOT: ax
; CHECK: {{$}}