-; RUN: opt < %s -instcombine -S | grep {ret i32 0}
-; PR4487
+; RUN: opt < %s -instcombine -S | FileCheck %s
-; Bitcasts between vectors and scalars are valid, despite being ill-advised.
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-apple-darwin10.0.0"
-define i32 @test(i64 %a) {
-bb20:
+; 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-LABEL: @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-LABEL: @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-LABEL: @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
+}
+
+; Both bitcasts are unnecessary; change the extractelement.
+
+define float @bitcast_extelt1(<2 x float> %A) {
+ %bc1 = bitcast <2 x float> %A to <2 x i32>
+ %ext = extractelement <2 x i32> %bc1, i32 0
+ %bc2 = bitcast i32 %ext to float
+ ret float %bc2
+
+; CHECK-LABEL: @bitcast_extelt1(
+; CHECK-NEXT: %bc2 = extractelement <2 x float> %A, i32 0
+; CHECK-NEXT: ret float %bc2
+}
+
+; Second bitcast can be folded into the first.
+
+define i64 @bitcast_extelt2(<4 x float> %A) {
+ %bc1 = bitcast <4 x float> %A to <2 x double>
+ %ext = extractelement <2 x double> %bc1, i32 1
+ %bc2 = bitcast double %ext to i64
+ ret i64 %bc2
+
+; CHECK-LABEL: @bitcast_extelt2(
+; CHECK-NEXT: %bc = bitcast <4 x float> %A to <2 x i64>
+; CHECK-NEXT: %bc2 = extractelement <2 x i64> %bc, i32 1
+; CHECK-NEXT: ret i64 %bc2
}
+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-LABEL: @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-LABEL: @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-LABEL: @test6(
+; CHECK-NEXT: insertelement <2 x float> <float 4.200000e+01, float undef>, float %A, i32 1
+; CHECK: ret
+}
+
+define i64 @ISPC0(i64 %in) {
+ %out = and i64 %in, xor (i64 bitcast (<4 x i16> <i16 -1, i16 -1, i16 -1, i16 -1> to i64), i64 -1)
+ ret i64 %out
+; CHECK-LABEL: @ISPC0(
+; CHECK: ret i64 0
+}
+
+
+define i64 @Vec2(i64 %in) {
+ %out = and i64 %in, xor (i64 bitcast (<4 x i16> <i16 0, i16 0, i16 0, i16 0> to i64), i64 0)
+ ret i64 %out
+; CHECK-LABEL: @Vec2(
+; CHECK: ret i64 0
+}
+
+define i64 @All11(i64 %in) {
+ %out = and i64 %in, xor (i64 bitcast (<2 x float> bitcast (i64 -1 to <2 x float>) to i64), i64 -1)
+ ret i64 %out
+; CHECK-LABEL: @All11(
+; CHECK: ret i64 0
+}
+
+
+define i32 @All111(i32 %in) {
+ %out = and i32 %in, xor (i32 bitcast (<1 x float> bitcast (i32 -1 to <1 x float>) to i32), i32 -1)
+ ret i32 %out
+; CHECK-LABEL: @All111(
+; CHECK: ret i32 0
+}
+
+define <2 x i16> @BitcastInsert(i32 %a) {
+ %v = insertelement <1 x i32> undef, i32 %a, i32 0
+ %r = bitcast <1 x i32> %v to <2 x i16>
+ ret <2 x i16> %r
+; CHECK-LABEL: @BitcastInsert(
+; CHECK: bitcast i32 %a to <2 x i16>
+}
+
+; PR17293
+define <2 x i64> @test7(<2 x i8*>* %arg) nounwind {
+ %cast = bitcast <2 x i8*>* %arg to <2 x i64>*
+ %load = load <2 x i64>, <2 x i64>* %cast, align 16
+ ret <2 x i64> %load
+; CHECK: @test7
+; CHECK: bitcast
+; CHECK: load
+}
projects / oota-llvm.git / blobdiff