diff options
Diffstat (limited to 'test/CodeGen/SystemZ/risbg-01.ll')
| -rw-r--r-- | test/CodeGen/SystemZ/risbg-01.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/risbg-01.ll b/test/CodeGen/SystemZ/risbg-01.ll index 8a5d4874f6..a4d11fdae5 100644 --- a/test/CodeGen/SystemZ/risbg-01.ll +++ b/test/CodeGen/SystemZ/risbg-01.ll @@ -456,3 +456,17 @@ define i64 @f40(i64 %foo, i64 *%dest) { %and = and i64 %shl, 2147483647 ret i64 %and } + +; In this case the sign extension is converted to a pair of 32-bit shifts, +; which is then extended to 64 bits. We previously used the wrong bit size +; when testing whether the shifted-in bits of the shift right were significant. +define i64 @f41(i1 %x) { +; CHECK-LABEL: f41: +; CHECK: sll %r2, 31 +; CHECK: sra %r2, 31 +; CHECK: llgcr %r2, %r2 +; CHECK: br %r14 + %ext = sext i1 %x to i8 + %ext2 = zext i8 %ext to i64 + ret i64 %ext2 +} |