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llvm-mirror/test/CodeGen/X86/widen_load-2.ll
Bruno Cardoso Lopes cdd0e7bf5f [x86] Combine x86mmx/i64 to v2i64 conversion to use scalar_to_vector 
Handle the poor codegen for i64/x86xmm->v2i64 (%mm -> %xmm) moves. Instead of
using stack store/load pair to do the job, use scalar_to_vector directly, which
in the MMX case can use movq2dq. This was the current behavior prior to
improvements for vector legalization of extloads in r213897.

This commit fixes the regression and as a side-effect also remove some
unnecessary shuffles.

In the new attached testcase, we go from:

pshufw  $-18, (%rdi), %mm0
movq    %mm0, -8(%rsp)
movq    -8(%rsp), %xmm0
pshufd  $-44, %xmm0, %xmm0
movd    %xmm0, %eax
...

To:

pshufw  $-18, (%rdi), %mm0
movq2dq %mm0, %xmm0
movd    %xmm0, %eax
...

Differential Revision: http://reviews.llvm.org/D7126
rdar://problem/19413324

llvm-svn: 226953
2015-01-23 22:44:16 +00:00

228 lines
8.5 KiB
LLVM
Raw Blame History

; RUN: llc < %s -o - -mcpu=generic -march=x86-64 -mattr=+sse4.2 | FileCheck %s
; Test based on pr5626 to load/store
;
%i32vec3 = type <3 x i32>
define void @add3i32(%i32vec3* sret %ret, %i32vec3* %ap, %i32vec3* %bp) {
; CHECK-LABEL: add3i32:
; CHECK: movdqa (%{{.*}}), %[[R0:xmm[0-9]+]]
; CHECK-NEXT: paddd (%{{.*}}), %[[R0]]
; CHECK-NEXT: pextrd $2, %[[R0]], 8(%{{.*}})
; CHECK-NEXT: movq %[[R0]], (%{{.*}})
%a = load %i32vec3* %ap, align 16
%b = load %i32vec3* %bp, align 16
%x = add %i32vec3 %a, %b
store %i32vec3 %x, %i32vec3* %ret, align 16
ret void
}
define void @add3i32_2(%i32vec3* sret %ret, %i32vec3* %ap, %i32vec3* %bp) {
; CHECK-LABEL: add3i32_2:
; CHECK: movq (%{{.*}}), %[[R0:xmm[0-9]+]]
; CHECK-NEXT: pinsrd $2, 8(%{{.*}}), %[[R0]]
; CHECK-NEXT: movq (%{{.*}}), %[[R1:xmm[0-9]+]]
; CHECK-NEXT: pinsrd $2, 8(%{{.*}}), %[[R1]]
; CHECK-NEXT: paddd %[[R0]], %[[R1]]
; CHECK-NEXT: pextrd $2, %[[R1]], 8(%{{.*}})
; CHECK-NEXT: movq %[[R1]], (%{{.*}})
%a = load %i32vec3* %ap, align 8
%b = load %i32vec3* %bp, align 8
%x = add %i32vec3 %a, %b
store %i32vec3 %x, %i32vec3* %ret, align 8
ret void
}
%i32vec7 = type <7 x i32>
define void @add7i32(%i32vec7* sret %ret, %i32vec7* %ap, %i32vec7* %bp) {
; CHECK-LABEL: add7i32:
; CHECK: movdqa (%{{.*}}), %[[R0:xmm[0-9]+]]
; CHECK-NEXT: movdqa 16(%{{.*}}), %[[R1:xmm[0-9]+]]
; CHECK-NEXT: paddd (%{{.*}}), %[[R0]]
; CHECK-NEXT: paddd 16(%{{.*}}), %[[R1]]
; CHECK-NEXT: pextrd $2, %[[R1]], 24(%{{.*}})
; CHECK-NEXT: movq %[[R1]], 16(%{{.*}})
; CHECK-NEXT: movdqa %[[R0]], (%{{.*}})
%a = load %i32vec7* %ap, align 16
%b = load %i32vec7* %bp, align 16
%x = add %i32vec7 %a, %b
store %i32vec7 %x, %i32vec7* %ret, align 16
ret void
}
%i32vec12 = type <12 x i32>
define void @add12i32(%i32vec12* sret %ret, %i32vec12* %ap, %i32vec12* %bp) {
; CHECK-LABEL: add12i32:
; CHECK: movdqa (%{{.*}}), %[[R0:xmm[0-9]+]]
; CHECK-NEXT: movdqa 16(%{{.*}}), %[[R1:xmm[0-9]+]]
; CHECK-NEXT: movdqa 32(%{{.*}}), %[[R2:xmm[0-9]+]]
; CHECK-NEXT: paddd (%{{.*}}), %[[R0]]
; CHECK-NEXT: paddd 16(%{{.*}}), %[[R1]]
; CHECK-NEXT: paddd 32(%{{.*}}), %[[R2]]
; CHECK-NEXT: movdqa %[[R2]], 32(%{{.*}})
; CHECK-NEXT: movdqa %[[R1]], 16(%{{.*}})
; CHECK-NEXT: movdqa %[[R0]], (%{{.*}})
%a = load %i32vec12* %ap, align 16
%b = load %i32vec12* %bp, align 16
%x = add %i32vec12 %a, %b
store %i32vec12 %x, %i32vec12* %ret, align 16
ret void
}
%i16vec3 = type <3 x i16>
define void @add3i16(%i16vec3* nocapture sret %ret, %i16vec3* %ap, %i16vec3* %bp) nounwind {
; CHECK-LABEL: add3i16:
; CHECK: pmovzxwd (%{{.*}}), %[[R0:xmm[0-9]+]]
; CHECK-NEXT: pmovzxwd (%{{.*}}), %[[R1:xmm[0-9]+]]
; CHECK-NEXT: paddd %[[R0]], %[[R1]]
; CHECK-NEXT: pextrw $4, %[[R1]], 4(%{{.*}})
; CHECK-NEXT: pshufb {{.*}}, %[[R1]]
; CHECK-NEXT: movd %[[R1]], (%{{.*}})
%a = load %i16vec3* %ap, align 16
%b = load %i16vec3* %bp, align 16
%x = add %i16vec3 %a, %b
store %i16vec3 %x, %i16vec3* %ret, align 16
ret void
}
%i16vec4 = type <4 x i16>
define void @add4i16(%i16vec4* nocapture sret %ret, %i16vec4* %ap, %i16vec4* %bp) nounwind {
; CHECK-LABEL: add4i16:
; CHECK: movq (%{{.*}}), %[[R0:xmm[0-9]+]]
; CHECK-NEXT: movq (%{{.*}}), %[[R1:xmm[0-9]+]]
; CHECK-NEXT: paddw %[[R0]], %[[R1]]
; CHECK-NEXT: movq %[[R1]], (%{{.*}})
%a = load %i16vec4* %ap, align 16
%b = load %i16vec4* %bp, align 16
%x = add %i16vec4 %a, %b
store %i16vec4 %x, %i16vec4* %ret, align 16
ret void
}
%i16vec12 = type <12 x i16>
define void @add12i16(%i16vec12* nocapture sret %ret, %i16vec12* %ap, %i16vec12* %bp) nounwind {
; CHECK-LABEL: add12i16:
; CHECK: movdqa (%{{.*}}), %[[R0:xmm[0-9]+]]
; CHECK-NEXT: movdqa 16(%{{.*}}), %[[R1:xmm[0-9]+]]
; CHECK-NEXT: paddw (%{{.*}}), %[[R0]]
; CHECK-NEXT: paddw 16(%{{.*}}), %[[R1]]
; CHECK-NEXT: movq %[[R1]], 16(%{{.*}})
; CHECK-NEXT: movdqa %[[R0]], (%{{.*}})
%a = load %i16vec12* %ap, align 16
%b = load %i16vec12* %bp, align 16
%x = add %i16vec12 %a, %b
store %i16vec12 %x, %i16vec12* %ret, align 16
ret void
}
%i16vec18 = type <18 x i16>
define void @add18i16(%i16vec18* nocapture sret %ret, %i16vec18* %ap, %i16vec18* %bp) nounwind {
; CHECK-LABEL: add18i16:
; CHECK: movdqa (%{{.*}}), %[[R0:xmm[0-9]+]]
; CHECK-NEXT: movdqa 16(%{{.*}}), %[[R1:xmm[0-9]+]]
; CHECK-NEXT: movdqa 32(%{{.*}}), %[[R2:xmm[0-9]+]]
; CHECK-NEXT: paddw (%{{.*}}), %[[R0]]
; CHECK-NEXT: paddw 16(%{{.*}}), %[[R1]]
; CHECK-NEXT: paddw 32(%{{.*}}), %[[R2]]
; CHECK-NEXT: movd %[[R2]], 32(%{{.*}})
; CHECK-NEXT: movdqa %[[R1]], 16(%{{.*}})
; CHECK-NEXT: movdqa %[[R0]], (%{{.*}})
%a = load %i16vec18* %ap, align 16
%b = load %i16vec18* %bp, align 16
%x = add %i16vec18 %a, %b
store %i16vec18 %x, %i16vec18* %ret, align 16
ret void
}
%i8vec3 = type <3 x i8>
define void @add3i8(%i8vec3* nocapture sret %ret, %i8vec3* %ap, %i8vec3* %bp) nounwind {
; CHECK-LABEL: add3i8:
; CHECK: pmovzxbd (%{{.*}}), %[[R0:xmm[0-9]+]]
; CHECK-NEXT: pmovzxbd (%{{.*}}), %[[R1:xmm[0-9]+]]
; CHECK-NEXT: paddd %[[R0]], %[[R1]]
; CHECK-NEXT: pextrb $8, %[[R1]], 2(%{{.*}})
; CHECK-NEXT: pshufb {{.*}}, %[[R1]]
; CHECK-NEXT: pmovzxwq %[[R1]], %[[R0]]
; CHECK-NEXT: movd %[[R0]], %e[[R2:[abcd]]]x
; CHECK-NEXT: movw %[[R2]]x, (%{{.*}})
%a = load %i8vec3* %ap, align 16
%b = load %i8vec3* %bp, align 16
%x = add %i8vec3 %a, %b
store %i8vec3 %x, %i8vec3* %ret, align 16
ret void
}
%i8vec31 = type <31 x i8>
define void @add31i8(%i8vec31* nocapture sret %ret, %i8vec31* %ap, %i8vec31* %bp) nounwind {
; CHECK-LABEL: add31i8:
; CHECK: movdqa (%{{.*}}), %[[R0:xmm[0-9]+]]
; CHECK-NEXT: movdqa 16(%{{.*}}), %[[R1:xmm[0-9]+]]
; CHECK-NEXT: paddb (%{{.*}}), %[[R0]]
; CHECK-NEXT: paddb 16(%{{.*}}), %[[R1]]
; CHECK-NEXT: pextrb $14, %[[R1]], 30(%{{.*}})
; CHECK-NEXT: pextrw $6, %[[R1]], 28(%{{.*}})
; CHECK-NEXT: pextrd $2, %[[R1]], 24(%{{.*}})
; CHECK-NEXT: movq %[[R1]], 16(%{{.*}})
; CHECK-NEXT: movdqa %[[R0]], (%{{.*}})
%a = load %i8vec31* %ap, align 16
%b = load %i8vec31* %bp, align 16
%x = add %i8vec31 %a, %b
store %i8vec31 %x, %i8vec31* %ret, align 16
ret void
}
%i8vec3pack = type { <3 x i8>, i8 }
define void @rot(%i8vec3pack* nocapture sret %result, %i8vec3pack* %X, %i8vec3pack* %rot) nounwind {
; CHECK-LABEL: rot:
; CHECK: movdqa {{.*}}, %[[CONSTANT0:xmm[0-9]+]]
; CHECK-NEXT: movdqa {{.*}}, %[[SHUFFLE_MASK:xmm[0-9]+]]
; CHECK-NEXT: pshufb %[[SHUFFLE_MASK]], %[[CONSTANT0]]
; CHECK-NEXT: pmovzxwq %[[CONSTANT0]], %[[CONSTANT0]]
; CHECK-NEXT: movd %[[CONSTANT0]], %e[[R0:[abcd]]]x
; CHECK-NEXT: movw %[[R0]]x, (%[[PTR0:.*]])
; CHECK-NEXT: movb $-98, 2(%[[PTR0]])
; CHECK-NEXT: movdqa {{.*}}, %[[CONSTANT1:xmm[0-9]+]]
; CHECK-NEXT: pshufb %[[SHUFFLE_MASK]], %[[CONSTANT1]]
; CHECK-NEXT: pmovzxwq %[[CONSTANT1]], %[[CONSTANT1]]
; CHECK-NEXT: movd %[[CONSTANT1]], %e[[R1:[abcd]]]x
; CHECK-NEXT: movw %[[R1]]x, (%[[PTR1:.*]])
; CHECK-NEXT: movb $1, 2(%[[PTR1]])
; CHECK-NEXT: movl (%[[PTR0]]), [[TMP1:%e[abcd]+x]]
; CHECK-NEXT: movl [[TMP1]], [[TMP2:.*]]
; CHECK-NEXT: pmovzxbd [[TMP2]], %[[X0:xmm[0-9]+]]
; CHECK-NEXT: pextrd $1, %[[X0]], %e[[R0:[abcd]]]x
; CHECK-NEXT: shrl %e[[R0]]x
; CHECK-NEXT: movd %[[X0]], %e[[R1:[abcd]]]x
; CHECK-NEXT: shrl %e[[R1]]x
; CHECK-NEXT: movd %e[[R1]]x, %[[X1:xmm[0-9]+]]
; CHECK-NEXT: pinsrd $1, %e[[R0]]x, %[[X1]]
; CHECK-NEXT: pextrd $2, %[[X0]], %e[[R0:[abcd]]]x
; CHECK-NEXT: shrl %e[[R0]]x
; CHECK-NEXT: pinsrd $2, %e[[R0]]x, %[[X1]]
; CHECK-NEXT: pextrd $3, %[[X0]], %e[[R0:[abcd]]]x
; CHECK-NEXT: pinsrd $3, %e[[R0]]x, %[[X1]]
; CHECK-NEXT: pextrb $8, %[[X1]], 2(%{{.*}})
; CHECK-NEXT: pshufb %[[SHUFFLE_MASK]], %[[X1]]
; CHECK-NEXT: pmovzxwq %[[X1]], %[[X3:xmm[0-9]+]]
; CHECK-NEXT: movd %[[X3]], %e[[R0:[abcd]]]x
; CHECK-NEXT: movw %[[R0]]x, (%{{.*}})
entry:
%storetmp = bitcast %i8vec3pack* %X to <3 x i8>*
store <3 x i8> <i8 -98, i8 -98, i8 -98>, <3 x i8>* %storetmp
%storetmp1 = bitcast %i8vec3pack* %rot to <3 x i8>*
store <3 x i8> <i8 1, i8 1, i8 1>, <3 x i8>* %storetmp1
%tmp = load %i8vec3pack* %X
%extractVec = extractvalue %i8vec3pack %tmp, 0
%tmp2 = load %i8vec3pack* %rot
%extractVec3 = extractvalue %i8vec3pack %tmp2, 0
%shr = lshr <3 x i8> %extractVec, %extractVec3
%storetmp4 = bitcast %i8vec3pack* %result to <3 x i8>*
store <3 x i8> %shr, <3 x i8>* %storetmp4
ret void
}
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