fix PR5978 by peeling the loop so that we avoid shifting the

result int by 8 for the first byte.  While normally harmless,
if the result is smaller than a byte, this shift is invalid.

llvm-svn: 93018

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/test/Transforms/ConstProp/loads.ll b/llvm/test/Transforms/ConstProp/loads.ll
index 9151d256b02..9fbba2b3552 100644
--- a/llvm/test/Transforms/ConstProp/loads.ll
+++ b/llvm/test/Transforms/ConstProp/loads.ll
@@ -110,3 +110,13 @@ define i16 @test12() {
 ; CHECK: @test12
 ; CHECK: ret i16 98
 }
+
+
+; PR5978
+@g5 = constant i8 4
+define i1 @test13() {
+  %A = load i1* bitcast (i8* @g5 to i1*)
+  ret i1 %A
+; CHECK: @test13
+; CHECK: ret i1 false
+}