diff options
author | Jack Carter <jack.carter@imgtec.com> | 2013-04-09 23:19:50 +0000 |
---|---|---|
committer | Jack Carter <jack.carter@imgtec.com> | 2013-04-09 23:19:50 +0000 |
commit | a9a5c537ad0bf5ab68ed79c163500a4fcb3fc3ff (patch) | |
tree | 57c2a11063ebbd34b67e5e51dde9e11aca390a95 /test/CodeGen/Mips | |
parent | 7eb0d8148e1210d9e31ab471477de47b53bab117 (diff) | |
download | llvm-a9a5c537ad0bf5ab68ed79c163500a4fcb3fc3ff.tar.gz llvm-a9a5c537ad0bf5ab68ed79c163500a4fcb3fc3ff.tar.bz2 llvm-a9a5c537ad0bf5ab68ed79c163500a4fcb3fc3ff.tar.xz |
Mips specific inline asm operand modifier 'D'
Modifier 'D' is to use the second word of a double integer.
We had previously implemented the pure register varient of
the modifier and this patch implements the memory reference.
#include "stdio.h"
int b[8] = {0,1,2,3,4,5,6,7};
void main()
{
int i;
// The first word. Notice, no 'D'
{asm (
"lw %0,%1;"
: "=r" (i)
: "m" (*(b+4))
);}
printf("%d\n",i);
// The second word
{asm (
"lw %0,%D1;"
: "=r" (i)
: "m" (*(b+4))
);}
printf("%d\n",i);
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179135 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/Mips')
-rw-r--r-- | test/CodeGen/Mips/inlineasmmemop.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/CodeGen/Mips/inlineasmmemop.ll b/test/CodeGen/Mips/inlineasmmemop.ll index 1c7c4437b8..dbd62a165d 100644 --- a/test/CodeGen/Mips/inlineasmmemop.ll +++ b/test/CodeGen/Mips/inlineasmmemop.ll @@ -1,5 +1,6 @@ ; RUN: llc -march=mipsel < %s | FileCheck %s +; Simple memory @g1 = external global i32 define i32 @f1(i32 %x) nounwind { @@ -21,3 +22,19 @@ entry: ret i32 %0 } +; "D": Second word of double word. This works for any memory element. +; CHECK: #APP +; CHECK-NEXT: lw ${{[0-9]+}},4(${{[0-9]+}}); +; CHECK-NEXT: #NO_APP + +@b = common global [20 x i32] zeroinitializer, align 4 + +define void @main() #0 { +entry: + tail call void asm sideeffect " lw $0,${1:D};", "r,*m,~{$11}"(i32 undef, i32* getelementptr inbounds ([20 x i32]* @b, i32 0, i32 3)) #1 + ret void +} + +attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" } +attributes #1 = { nounwind } + |