File: inline-asm-flag-clobber.ll

package info (click to toggle)
llvm-toolchain-7 1%3A7.0.1-8~deb9u3
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • 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 (32 lines) | stat: -rw-r--r-- 987 bytes parent folder | download | duplicates (13)
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
32
; RUN: llc -mtriple=x86_64-- -no-integrated-as < %s | FileCheck %s
; PR3701

define i64 @t(i64* %arg) nounwind {
        br i1 true, label %1, label %5

; <label>:1             ; preds = %0
        %2 = icmp eq i64* null, %arg            ; <i1> [#uses=1]
        %3 = tail call i64* asm sideeffect "movl %fs:0,$0", "=r,~{dirflag},~{fpsr},~{flags}"() nounwind         ; <%struct.thread*> [#uses=0]
; CHECK: test
; CHECK-NEXT: j
        br i1 %2, label %4, label %5

; <label>:4             ; preds = %1
        ret i64 1

; <label>:5             ; preds = %1
        ret i64 0
}

; Make sure that we translate this to the bswap intrinsic which lowers down without the
; inline assembly.
; CHECK-NOT: #APP
define i32 @s(i32 %argc, i8** nocapture %argv) unnamed_addr nounwind {
entry:
  %0 = trunc i32 %argc to i16
  %asmtmp = tail call i16 asm "rorw $$8, ${0:w}", "=r,0,~{fpsr},~{flags},~{cc}"(i16 %0) nounwind, !srcloc !0
  %1 = zext i16 %asmtmp to i32
  ret i32 %1
}

!0 = !{i64 935930}