Fix big-endian handling of integer-to-vector bitcasts in InstCombine

These functions used to assume that the lsb of an integer corresponds
to vector element 0, whereas for big-endian it's the other way around:
the msb is in the first element and the lsb is in the last element.

Fixes MultiSource/Benchmarks/mediabench/gsm/toast for z.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188155 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 41 insertions, 0 deletions

diff --git a/test/Transforms/InstCombine/bitcast-bigendian.ll b/test/Transforms/InstCombine/bitcast-bigendian.ll
index 28b0e9a..ed812e1 100644
--- a/test/Transforms/InstCombine/bitcast-bigendian.ll
+++ b/test/Transforms/InstCombine/bitcast-bigendian.ll
@@ -48,3 +48,44 @@ define float @test3(<2 x float> %A, <2 x i64> %B) {
 ; 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-LABEL: @test4(
+  ; CHECK-NEXT: insertelement <2 x i32> undef, i32 %B, i32 0
+  ; CHECK-NEXT: insertelement <2 x i32> {{.*}}, i32 %A, i32 1
+  ; CHECK-NEXT: ret <2 x i32>
+
+}
+
+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 %B, i32 0
+  ; CHECK-NEXT: insertelement <2 x float> {{.*}}, float %A, 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> undef, float %A, i32 0
+; CHECK-NEXT: insertelement <2 x float> {{.*}}, float 4.200000e+01, i32 1
+; CHECK: ret
+}