Enhance constant folding of bitcast operations on vectors of floats.

Add getAllOnesValue of FP numbers to Constants and APFloat.
Add more tests.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125776 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 41 insertions, 1 deletions

diff --git a/test/Transforms/InstCombine/bitcast-vec-uniform.ll b/test/Transforms/InstCombine/bitcast-vec-uniform.ll
index a0d4678b0a..5975f1ec39 100644
--- a/test/Transforms/InstCombine/bitcast-vec-uniform.ll
+++ b/test/Transforms/InstCombine/bitcast-vec-uniform.ll
@@ -18,7 +18,8 @@ define <4 x i32> @b(<1 x i64> %y) {
 }
 
 ; CHECK: @foo
-; CHECK: bitcast
+; CHECK-NOT: bitcast
+; CHECK: ret
 
 ; from MultiSource/Benchmarks/Bullet
 define <2 x float> @foo() {
@@ -27,4 +28,43 @@ define <2 x float> @foo() {
 }
 
 
+; CHECK: @foo2
+; CHECK-NOT: bitcast
+; CHECK: ret
+define <2 x double> @foo2() {
+  %cast = bitcast i128 -1 to <2 x double>
+  ret <2 x double> %cast
+}
 
+; CHECK: @foo3
+; CHECK-NOT: bitcast
+; CHECK: ret
+define <1 x float> @foo3() {
+  %cast = bitcast i32 -1 to <1 x float>
+  ret <1 x float> %cast
+}
+
+; CHECK: @foo4
+; CHECK-NOT: bitcast
+; CHECK: ret
+define float @foo4() {
+  %cast = bitcast <1 x i32 ><i32 -1> to float
+  ret float %cast
+}
+
+; CHECK: @foo5
+; CHECK-NOT: bitcast
+; CHECK: ret
+define double @foo5() {
+  %cast = bitcast <2 x i32 ><i32 -1, i32 -1> to double
+  ret double %cast
+}
+
+
+; CHECK: @foo6
+; CHECK-NOT: bitcast
+; CHECK: ret
+define <2 x double> @foo6() {
+  %cast = bitcast <4 x i32><i32 -1, i32 -1, i32 -1, i32 -1> to <2 x double>
+  ret <2 x double> %cast
+}