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854cd758f6
Summary: Discovered by Dave Airlie, fixes an assertion in Khronos OpenGL CTS GL43-CTS.shader_storage_buffer_object.advanced-matrix. In this particular case, the buffer load intrinsic fed into a uniform conditional branch, and led the brcond lowering down the wrong path. Reviewers: tstellarAMD, arsenm Subscribers: arsenm, llvm-commits Differential Revision: http://reviews.llvm.org/D19931 llvm-svn: 268650
28 lines
836 B
LLVM
28 lines
836 B
LLVM
; RUN: llc -march=amdgcn -mcpu=verde -verify-machineinstrs < %s | FileCheck %s
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; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck %s
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; This used to raise an assertion due to how the choice between uniform and
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; non-uniform branches was determined.
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;
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; CHECK-LABEL: {{^}}main:
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; CHECK: s_cbranch_vccnz
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define amdgpu_ps float @main(<4 x i32> inreg %rsrc) {
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main_body:
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%v = call float @llvm.amdgcn.buffer.load.f32(<4 x i32> %rsrc, i32 0, i32 0, i1 true, i1 false)
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%cc = fcmp une float %v, 1.000000e+00
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br i1 %cc, label %if, label %else
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if:
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%u = fadd float %v, %v
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br label %else
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else:
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%r = phi float [ %v, %main_body ], [ %u, %if ]
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ret float %r
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}
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; Function Attrs: nounwind readonly
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declare float @llvm.amdgcn.buffer.load.f32(<4 x i32>, i32, i32, i1, i1) #0
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attributes #0 = { nounwind readonly }
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