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
33
34
35
36
37
38
39
40
41
42
43
|
; RUN: llc < %s -verify-machineinstrs -mtriple=powerpc-unknown-unkown \
; RUN: -mcpu=pwr7 -O0 2>&1 | FileCheck %s
; RUN: llc < %s -verify-machineinstrs -mtriple=powerpc64-unknown-unkown \
; RUN: -mcpu=pwr7 -O0 2>&1 | FileCheck %s
define void @test_r1_clobber() {
entry:
call void asm sideeffect "nop", "~{r1}"()
ret void
}
; CHECK: warning: inline asm clobber list contains reserved registers: R1
; CHECK-NEXT: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
define void @test_x1_clobber() {
entry:
call void asm sideeffect "nop", "~{x1}"()
ret void
}
; CHECK: warning: inline asm clobber list contains reserved registers: X1
; CHECK-NEXT: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
; CHECK: warning: inline asm clobber list contains reserved registers: R31
; CHECK-NEXT: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
@a = dso_local global i32 100, align 4
define dso_local signext i32 @main() {
entry:
%retval = alloca i32, align 4
%old = alloca i64, align 8
store i32 0, ptr %retval, align 4
call void asm sideeffect "li 31, 1", "~{r31}"()
call void asm sideeffect "li 30, 1", "~{r30}"()
%0 = call i64 asm sideeffect "mr $0, 31", "=r"()
store i64 %0, ptr %old, align 8
%1 = load i32, ptr @a, align 4
%conv = sext i32 %1 to i64
%2 = alloca i8, i64 %conv, align 16
%3 = load i64, ptr %old, align 8
%conv1 = trunc i64 %3 to i32
ret i32 %conv1
}
|
