diff options
Diffstat (limited to 'llvm/test/CodeGen/X86/fast-isel-constant.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/fast-isel-constant.ll | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/fast-isel-constant.ll b/llvm/test/CodeGen/X86/fast-isel-constant.ll new file mode 100644 index 00000000000..394c1f93704 --- /dev/null +++ b/llvm/test/CodeGen/X86/fast-isel-constant.ll @@ -0,0 +1,32 @@ +; RUN: llc < %s -march=x86-64 -O0 | FileCheck %s +; Make sure fast-isel doesn't reset the materialised constant map +; across an intrinsic call. + +; CHECK: movl $100000 +; CHECK-NOT: movl $100000 +define i1 @test1(i32 %v1, i32 %v2, i32* %X) nounwind { +entry: + %a = shl i32 100000, %v1 + %t = call {i32, i1} @llvm.sadd.with.overflow.i32(i32 %a, i32 %v2) + %ext = extractvalue {i32, i1} %t, 0 + %sum = shl i32 100000, %ext + %obit = extractvalue {i32, i1} %t, 1 + br i1 %obit, label %overflow, label %normal + +normal: + store i32 %sum, i32* %X + br label %overflow + +overflow: + ret i1 false + +; X32: test4: +; X32: addl +; X32-NEXT: jo + +; X64: test4: +; X64: addl %e[[A1:si|dx]], %e[[A0:di|cx]] +; X64-NEXT: jo +} + +declare {i32, i1} @llvm.sadd.with.overflow.i32(i32, i32) |
