diff options
Diffstat (limited to 'llvm/test/CodeGen/X86/shift-double-x86_64.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/shift-double-x86_64.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/shift-double-x86_64.ll b/llvm/test/CodeGen/X86/shift-double-x86_64.ll index da5d10c6ee5..22993cd09df 100644 --- a/llvm/test/CodeGen/X86/shift-double-x86_64.ll +++ b/llvm/test/CodeGen/X86/shift-double-x86_64.ll @@ -114,3 +114,26 @@ define i64 @test7(i64 %hi, i64 %lo, i64 %bits) nounwind { %sh = or i64 %sh_lo, %sh_hi ret i64 %sh } + +define i64 @test8(i64 %hi, i64 %lo, i64 %bits) nounwind { +; CHECK-LABEL: test8: +; CHECK: # %bb.0: +; CHECK-NEXT: movq %rdi, %rax +; CHECK-NEXT: movl %edx, %ecx +; CHECK-NEXT: andb $63, %cl +; CHECK-NEXT: negb %cl +; CHECK-NEXT: shrq %cl, %rsi +; CHECK-NEXT: movl %edx, %ecx +; CHECK-NEXT: shlq %cl, %rax +; CHECK-NEXT: orq %rsi, %rax +; CHECK-NEXT: retq + %tbits = trunc i64 %bits to i8 + %tand = and i8 %tbits, 63 + %tand64 = sub i8 64, %tand + %and = zext i8 %tand to i64 + %and64 = zext i8 %tand64 to i64 + %sh_lo = lshr i64 %lo, %and64 + %sh_hi = shl i64 %hi, %and + %sh = or i64 %sh_lo, %sh_hi + ret i64 %sh +} |
