diff options
Diffstat (limited to 'test/CodeGen/SystemZ/int-abs-01.ll')
-rw-r--r-- | test/CodeGen/SystemZ/int-abs-01.ll | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/int-abs-01.ll b/test/CodeGen/SystemZ/int-abs-01.ll index 40fb611..053c347 100644 --- a/test/CodeGen/SystemZ/int-abs-01.ll +++ b/test/CodeGen/SystemZ/int-abs-01.ll @@ -81,3 +81,67 @@ define i64 @f7(i64 %val) { %res = select i1 %cmp, i64 %neg, i64 %val ret i64 %res } + +; Test another form of f6, which is that produced by InstCombine. +define i64 @f8(i64 %val) { +; CHECK-LABEL: f8: +; CHECK: lpgfr %r2, %r2 +; CHECK: br %r14 + %shl = shl i64 %val, 32 + %ashr = ashr i64 %shl, 32 + %neg = sub i64 0, %ashr + %cmp = icmp slt i64 %shl, 0 + %abs = select i1 %cmp, i64 %neg, i64 %ashr + ret i64 %abs +} + +; Try again with sle rather than slt. +define i64 @f9(i64 %val) { +; CHECK-LABEL: f9: +; CHECK: lpgfr %r2, %r2 +; CHECK: br %r14 + %shl = shl i64 %val, 32 + %ashr = ashr i64 %shl, 32 + %neg = sub i64 0, %ashr + %cmp = icmp sle i64 %shl, 0 + %abs = select i1 %cmp, i64 %neg, i64 %ashr + ret i64 %abs +} + +; Repeat f8 with the operands reversed. +define i64 @f10(i64 %val) { +; CHECK-LABEL: f10: +; CHECK: lpgfr %r2, %r2 +; CHECK: br %r14 + %shl = shl i64 %val, 32 + %ashr = ashr i64 %shl, 32 + %neg = sub i64 0, %ashr + %cmp = icmp sgt i64 %shl, 0 + %abs = select i1 %cmp, i64 %ashr, i64 %neg + ret i64 %abs +} + +; Try again with sge rather than sgt. +define i64 @f11(i64 %val) { +; CHECK-LABEL: f11: +; CHECK: lpgfr %r2, %r2 +; CHECK: br %r14 + %shl = shl i64 %val, 32 + %ashr = ashr i64 %shl, 32 + %neg = sub i64 0, %ashr + %cmp = icmp sge i64 %shl, 0 + %abs = select i1 %cmp, i64 %ashr, i64 %neg + ret i64 %abs +} + +; Repeat f5 with the comparison on the unextended value. +define i64 @f12(i32 %val) { +; CHECK-LABEL: f12: +; CHECK: lpgfr %r2, %r2 +; CHECK: br %r14 + %ext = sext i32 %val to i64 + %cmp = icmp slt i32 %val, 0 + %neg = sub i64 0, %ext + %abs = select i1 %cmp, i64 %neg, i64 %ext + ret i64 %abs +} |