b04e357d9b
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);
}
llvm-svn: 179135
41 lines
1.2 KiB
LLVM
41 lines
1.2 KiB
LLVM
; RUN: llc -march=mipsel < %s | FileCheck %s
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; Simple memory
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@g1 = external global i32
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define i32 @f1(i32 %x) nounwind {
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entry:
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; CHECK: addiu $[[T0:[0-9]+]], $sp
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; CHECK: #APP
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; CHECK: sw $4, 0($[[T0]])
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; CHECK: #NO_APP
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; CHECK: #APP
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; CHECK: lw $[[T3:[0-9]+]], 0($[[T0]])
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; CHECK: #NO_APP
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; CHECK: lw $[[T1:[0-9]+]], %got(g1)
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; CHECK: sw $[[T3]], 0($[[T1]])
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%l1 = alloca i32, align 4
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call void asm "sw $1, $0", "=*m,r"(i32* %l1, i32 %x) nounwind
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%0 = call i32 asm "lw $0, $1", "=r,*m"(i32* %l1) nounwind
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store i32 %0, i32* @g1, align 4
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ret i32 %0
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}
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; "D": Second word of double word. This works for any memory element.
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; CHECK: #APP
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; CHECK-NEXT: lw ${{[0-9]+}},4(${{[0-9]+}});
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; CHECK-NEXT: #NO_APP
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@b = common global [20 x i32] zeroinitializer, align 4
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define void @main() #0 {
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entry:
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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
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ret void
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}
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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" }
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attributes #1 = { nounwind }
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