mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-24 06:30:19 +00:00
7900779543
like this:
struct S { float A, B, C, D; };
struct S g;
struct S bar() {
struct S A = g;
++A.B;
A.A = 42;
return A;
}
we now generate:
_bar: ## @bar
## BB#0: ## %entry
movq _g@GOTPCREL(%rip), %rax
movss 12(%rax), %xmm0
pshufd $16, %xmm0, %xmm0
movss 4(%rax), %xmm2
movss 8(%rax), %xmm1
pshufd $16, %xmm1, %xmm1
unpcklps %xmm0, %xmm1
addss LCPI1_0(%rip), %xmm2
pshufd $16, %xmm2, %xmm2
movss LCPI1_1(%rip), %xmm0
pshufd $16, %xmm0, %xmm0
unpcklps %xmm2, %xmm0
ret
instead of:
_bar: ## @bar
## BB#0: ## %entry
movq _g@GOTPCREL(%rip), %rax
movss 12(%rax), %xmm0
pshufd $16, %xmm0, %xmm0
movss 4(%rax), %xmm2
movss 8(%rax), %xmm1
pshufd $16, %xmm1, %xmm1
unpcklps %xmm0, %xmm1
addss LCPI1_0(%rip), %xmm2
movd %xmm2, %eax
shlq $32, %rax
addq $1109917696, %rax ## imm = 0x42280000
movd %rax, %xmm0
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112345 91177308-0d34-0410-b5e6-96231b3b80d8
106 lines
3.4 KiB
LLVM
106 lines
3.4 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
; Bitcasts between vectors and scalars are valid.
|
|
; PR4487
|
|
define i32 @test1(i64 %a) {
|
|
%t1 = bitcast i64 %a to <2 x i32>
|
|
%t2 = bitcast i64 %a to <2 x i32>
|
|
%t3 = xor <2 x i32> %t1, %t2
|
|
%t4 = extractelement <2 x i32> %t3, i32 0
|
|
ret i32 %t4
|
|
|
|
; CHECK: @test1
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
; Optimize bitcasts that are extracting low element of vector. This happens
|
|
; because of SRoA.
|
|
; rdar://7892780
|
|
define float @test2(<2 x float> %A, <2 x i32> %B) {
|
|
%tmp28 = bitcast <2 x float> %A to i64 ; <i64> [#uses=2]
|
|
%tmp23 = trunc i64 %tmp28 to i32 ; <i32> [#uses=1]
|
|
%tmp24 = bitcast i32 %tmp23 to float ; <float> [#uses=1]
|
|
|
|
%tmp = bitcast <2 x i32> %B to i64
|
|
%tmp2 = trunc i64 %tmp to i32 ; <i32> [#uses=1]
|
|
%tmp4 = bitcast i32 %tmp2 to float ; <float> [#uses=1]
|
|
|
|
%add = fadd float %tmp24, %tmp4
|
|
ret float %add
|
|
|
|
; CHECK: @test2
|
|
; CHECK-NEXT: %tmp24 = extractelement <2 x float> %A, i32 0
|
|
; CHECK-NEXT: bitcast <2 x i32> %B to <2 x float>
|
|
; CHECK-NEXT: %tmp4 = extractelement <2 x float> {{.*}}, i32 0
|
|
; CHECK-NEXT: %add = fadd float %tmp24, %tmp4
|
|
; CHECK-NEXT: ret float %add
|
|
}
|
|
|
|
; Optimize bitcasts that are extracting other elements of a vector. This
|
|
; happens because of SRoA.
|
|
; rdar://7892780
|
|
define float @test3(<2 x float> %A, <2 x i64> %B) {
|
|
%tmp28 = bitcast <2 x float> %A to i64
|
|
%tmp29 = lshr i64 %tmp28, 32
|
|
%tmp23 = trunc i64 %tmp29 to i32
|
|
%tmp24 = bitcast i32 %tmp23 to float
|
|
|
|
%tmp = bitcast <2 x i64> %B to i128
|
|
%tmp1 = lshr i128 %tmp, 64
|
|
%tmp2 = trunc i128 %tmp1 to i32
|
|
%tmp4 = bitcast i32 %tmp2 to float
|
|
|
|
%add = fadd float %tmp24, %tmp4
|
|
ret float %add
|
|
|
|
; CHECK: @test3
|
|
; CHECK-NEXT: %tmp24 = extractelement <2 x float> %A, i32 1
|
|
; CHECK-NEXT: bitcast <2 x i64> %B to <4 x float>
|
|
; CHECK-NEXT: %tmp4 = extractelement <4 x float> {{.*}}, i32 2
|
|
; CHECK-NEXT: %add = fadd float %tmp24, %tmp4
|
|
; CHECK-NEXT: ret float %add
|
|
}
|
|
|
|
|
|
define <2 x i32> @test4(i32 %A, i32 %B){
|
|
%tmp38 = zext i32 %A to i64
|
|
%tmp32 = zext i32 %B to i64
|
|
%tmp33 = shl i64 %tmp32, 32
|
|
%ins35 = or i64 %tmp33, %tmp38
|
|
%tmp43 = bitcast i64 %ins35 to <2 x i32>
|
|
ret <2 x i32> %tmp43
|
|
; CHECK: @test4
|
|
; CHECK-NEXT: insertelement <2 x i32> undef, i32 %A, i32 0
|
|
; CHECK-NEXT: insertelement <2 x i32> {{.*}}, i32 %B, i32 1
|
|
; CHECK-NEXT: ret <2 x i32>
|
|
|
|
}
|
|
|
|
; rdar://8360454
|
|
define <2 x float> @test5(float %A, float %B) {
|
|
%tmp37 = bitcast float %A to i32
|
|
%tmp38 = zext i32 %tmp37 to i64
|
|
%tmp31 = bitcast float %B to i32
|
|
%tmp32 = zext i32 %tmp31 to i64
|
|
%tmp33 = shl i64 %tmp32, 32
|
|
%ins35 = or i64 %tmp33, %tmp38
|
|
%tmp43 = bitcast i64 %ins35 to <2 x float>
|
|
ret <2 x float> %tmp43
|
|
; CHECK: @test5
|
|
; CHECK-NEXT: insertelement <2 x float> undef, float %A, i32 0
|
|
; CHECK-NEXT: insertelement <2 x float> {{.*}}, float %B, i32 1
|
|
; CHECK-NEXT: ret <2 x float>
|
|
}
|
|
|
|
define <2 x float> @test6(float %A){
|
|
%tmp23 = bitcast float %A to i32 ; <i32> [#uses=1]
|
|
%tmp24 = zext i32 %tmp23 to i64 ; <i64> [#uses=1]
|
|
%tmp25 = shl i64 %tmp24, 32 ; <i64> [#uses=1]
|
|
%mask20 = or i64 %tmp25, 1109917696 ; <i64> [#uses=1]
|
|
%tmp35 = bitcast i64 %mask20 to <2 x float> ; <<2 x float>> [#uses=1]
|
|
ret <2 x float> %tmp35
|
|
; CHECK: @test6
|
|
; CHECK-NEXT: insertelement <2 x float> <float 4.200000e+01, float undef>, float %A, i32 1
|
|
; CHECK: ret
|
|
}
|