diff options
Diffstat (limited to 'test/CodeGen/X86/sbb.ll')
| -rw-r--r-- | test/CodeGen/X86/sbb.ll | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/test/CodeGen/X86/sbb.ll b/test/CodeGen/X86/sbb.ll new file mode 100644 index 0000000000000..bc00fc7c66ad7 --- /dev/null +++ b/test/CodeGen/X86/sbb.ll @@ -0,0 +1,138 @@ +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s + +; Vary the operand sizes for extra coverage, but the transform should be identical in all cases. + +; (X == 0) ? 0 : -1 --> (X == 0) - 1 + +define i8 @i8_select_0_or_neg1(i8 %x) { +; CHECK-LABEL: i8_select_0_or_neg1: +; CHECK: # BB#0: +; CHECK-NEXT: negb %dil +; CHECK-NEXT: sbbb %al, %al +; CHECK-NEXT: retq + %cmp = icmp eq i8 %x, 0 + %sel = select i1 %cmp, i8 0, i8 -1 + ret i8 %sel +} + +; (X == 0) ? 0 : -1 --> (X == 0) - 1 + +define i16 @i16_select_0_or_neg1_as_math(i16 %x) { +; CHECK-LABEL: i16_select_0_or_neg1_as_math: +; CHECK: # BB#0: +; CHECK-NEXT: negw %di +; CHECK-NEXT: sbbw %ax, %ax +; CHECK-NEXT: retq + %cmp = icmp eq i16 %x, 0 + %ext = zext i1 %cmp to i16 + %add = add i16 %ext, -1 + ret i16 %add +} + +; (X != 0) ? -1 : 0 --> 0 - (X != 0) + +define i32 @i32_select_0_or_neg1_commuted(i32 %x) { +; CHECK-LABEL: i32_select_0_or_neg1_commuted: +; CHECK: # BB#0: +; CHECK-NEXT: negl %edi +; CHECK-NEXT: sbbl %eax, %eax +; CHECK-NEXT: retq + %cmp = icmp ne i32 %x, 0 + %sel = select i1 %cmp, i32 -1, i32 0 + ret i32 %sel +} + +; (X != 0) ? -1 : 0 --> 0 - (X != 0) + +define i64 @i64_select_0_or_neg1_commuted_as_math(i64 %x) { +; CHECK-LABEL: i64_select_0_or_neg1_commuted_as_math: +; CHECK: # BB#0: +; CHECK-NEXT: negq %rdi +; CHECK-NEXT: sbbq %rax, %rax +; CHECK-NEXT: retq + %cmp = icmp ne i64 %x, 0 + %ext = zext i1 %cmp to i64 + %sub = sub i64 0, %ext + ret i64 %sub +} + +; (X == 0) ? -1 : 0 --> 0 - (X == 0) + +define i64 @i64_select_neg1_or_0(i64 %x) { +; CHECK-LABEL: i64_select_neg1_or_0: +; CHECK: # BB#0: +; CHECK-NEXT: cmpq $1, %rdi +; CHECK-NEXT: sbbq %rax, %rax +; CHECK-NEXT: retq + %cmp = icmp eq i64 %x, 0 + %sel = select i1 %cmp, i64 -1, i64 0 + ret i64 %sel +} + +; (X == 0) ? -1 : 0 --> 0 - (X == 0) + +define i32 @i32_select_neg1_or_0_as_math(i32 %x) { +; CHECK-LABEL: i32_select_neg1_or_0_as_math: +; CHECK: # BB#0: +; CHECK-NEXT: cmpl $1, %edi +; CHECK-NEXT: sbbl %eax, %eax +; CHECK-NEXT: retq + %cmp = icmp eq i32 %x, 0 + %ext = zext i1 %cmp to i32 + %sub = sub i32 0, %ext + ret i32 %sub +} + +; (X != 0) ? 0 : -1 --> (X != 0) - 1 + +define i16 @i16_select_neg1_or_0_commuted(i16 %x) { +; CHECK-LABEL: i16_select_neg1_or_0_commuted: +; CHECK: # BB#0: +; CHECK-NEXT: cmpw $1, %di +; CHECK-NEXT: sbbw %ax, %ax +; CHECK-NEXT: retq + %cmp = icmp ne i16 %x, 0 + %sel = select i1 %cmp, i16 0, i16 -1 + ret i16 %sel +} + +; (X != 0) ? 0 : -1 --> (X != 0) - 1 + +define i8 @i8_select_neg1_or_0_commuted_as_math(i8 %x) { +; CHECK-LABEL: i8_select_neg1_or_0_commuted_as_math: +; CHECK: # BB#0: +; CHECK-NEXT: cmpb $1, %dil +; CHECK-NEXT: sbbb %al, %al +; CHECK-NEXT: retq + %cmp = icmp ne i8 %x, 0 + %ext = zext i1 %cmp to i8 + %add = add i8 %ext, -1 + ret i8 %add +} + +; Make sure we're creating nodes with the right value types. This would crash. +; https://bugs.llvm.org/show_bug.cgi?id=33560 + +define void @PR33560(i8 %x, i64 %y) { +; CHECK-LABEL: PR33560: +; CHECK: # BB#0: # %entry +; CHECK-NEXT: negb %dil +; CHECK-NEXT: sbbq %rax, %rax +; CHECK-NEXT: cmpq %rsi, %rax +; CHECK-NEXT: retq +entry: + %cmp1 = icmp eq i8 %x, 0 + %ext = zext i1 %cmp1 to i64 + %add = add i64 %ext, -1 + %cmp2 = icmp eq i64 %add, %y + br i1 %cmp2, label %end, label %else + +else: + %tmp7 = zext i1 %cmp1 to i8 + br label %end + +end: + ret void +} + |