From d38272b214c09a63c14bb01ebc7dec28e3af1607 Mon Sep 17 00:00:00 2001 From: Matt Arsenault Date: Mon, 22 Feb 2016 23:45:42 +0000 Subject: [PATCH] AMDGPU: Add failing testcase for register coalescer llvm-svn: 261592 --- .../CodeGen/AMDGPU/reg-coalescer-sched-crash.ll | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 llvm/test/CodeGen/AMDGPU/reg-coalescer-sched-crash.ll diff --git a/llvm/test/CodeGen/AMDGPU/reg-coalescer-sched-crash.ll b/llvm/test/CodeGen/AMDGPU/reg-coalescer-sched-crash.ll new file mode 100644 index 0000000..2b7a4b2 --- /dev/null +++ b/llvm/test/CodeGen/AMDGPU/reg-coalescer-sched-crash.ll @@ -0,0 +1,44 @@ +; XFAIL: * +; RUN: llc -march=amdgcn -verify-machineinstrs < %s +; XUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s + +; The register coalescer introduces a verifier error which later +; results in a crash during scheduling. + +declare i32 @llvm.amdgcn.workitem.id.x() #0 + +define void @reg_coalescer_breaks_dead(<2 x i32> addrspace(1)* nocapture readonly %arg, i32 %arg1, i32 %arg2, i32 %arg3) #1 { +bb: + %id.x = call i32 @llvm.amdgcn.workitem.id.x() + %cmp0 = icmp eq i32 %id.x, 0 + br i1 %cmp0, label %bb3, label %bb4 + +bb3: ; preds = %bb + %tmp = ashr exact i32 undef, 8 + br label %bb6 + +bb4: ; preds = %bb6, %bb + %tmp5 = phi <2 x i32> [ zeroinitializer, %bb ], [ %tmp13, %bb6 ] + br i1 undef, label %bb15, label %bb16 + +bb6: ; preds = %bb6, %bb3 + %tmp7 = phi <2 x i32> [ zeroinitializer, %bb3 ], [ %tmp13, %bb6 ] + %tmp8 = add nsw i32 0, %arg1 + %tmp9 = add nsw i32 %tmp8, 0 + %tmp10 = sext i32 %tmp9 to i64 + %tmp11 = getelementptr inbounds <2 x i32>, <2 x i32> addrspace(1)* %arg, i64 %tmp10 + %tmp12 = load <2 x i32>, <2 x i32> addrspace(1)* %tmp11, align 8 + %tmp13 = add <2 x i32> %tmp12, %tmp7 + %tmp14 = icmp slt i32 undef, %arg2 + br i1 %tmp14, label %bb6, label %bb4 + +bb15: ; preds = %bb4 + store <2 x i32> %tmp5, <2 x i32> addrspace(3)* undef, align 8 + br label %bb16 + +bb16: ; preds = %bb15, %bb4 + unreachable +} + +attributes #0 = { nounwind readnone } +attributes #1 = { nounwind } -- 2.7.4