[SelectionDAG] Add ability for computeKnownBits to peek through bitcasts from 'large element' scalar/vector to 'small element' vector.
Extension to D27129 which already supported bitcasts from 'small element' vector to 'large element' scalar/vector types.
llvm-svn: 289329
diff --git a/llvm/test/CodeGen/X86/known-bits-vector.ll b/llvm/test/CodeGen/X86/known-bits-vector.ll
index 717c7c6..5f15fb2 100644
--- a/llvm/test/CodeGen/X86/known-bits-vector.ll
+++ b/llvm/test/CodeGen/X86/known-bits-vector.ll
@@ -427,22 +427,14 @@
; X32: # BB#0:
; X32-NEXT: vpsrlq $1, %xmm0, %xmm0
; X32-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[1,1,3,3]
-; X32-NEXT: vpblendw {{.*#+}} xmm1 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
-; X32-NEXT: vpsrld $16, %xmm0, %xmm0
-; X32-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
-; X32-NEXT: vaddps {{\.LCPI.*}}, %xmm0, %xmm0
-; X32-NEXT: vaddps %xmm0, %xmm1, %xmm0
+; X32-NEXT: vcvtdq2ps %xmm0, %xmm0
; X32-NEXT: retl
;
; X64-LABEL: knownbits_lshr_bitcast_shuffle_uitofp:
; X64: # BB#0:
; X64-NEXT: vpsrlq $1, %xmm0, %xmm0
; X64-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[1,1,3,3]
-; X64-NEXT: vpblendw {{.*#+}} xmm1 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
-; X64-NEXT: vpsrld $16, %xmm0, %xmm0
-; X64-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
-; X64-NEXT: vaddps {{.*}}(%rip), %xmm0, %xmm0
-; X64-NEXT: vaddps %xmm0, %xmm1, %xmm0
+; X64-NEXT: vcvtdq2ps %xmm0, %xmm0
; X64-NEXT: retq
%1 = lshr <2 x i64> %a0, <i64 1, i64 1>
%2 = bitcast <2 x i64> %1 to <4 x i32>