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173215fc06
For Cylone, the instruction "movi.2d vD, #0" is executed incorrectly in some rare circumstances. Work around the issue conservatively by avoiding the instruction entirely. This patch changes CodeGen so that problematic instructions are never generated, and the AsmParser so that an equivalent instruction is used (with a warning). llvm-svn: 320965
36 lines
1.0 KiB
LLVM
36 lines
1.0 KiB
LLVM
; RUN: llc -verify-machineinstrs -o - %s -mtriple=aarch64-none-linux-gnu -mcpu=cyclone | FileCheck %s
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@varfloat = global float 0.0
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@vardouble = global double 0.0
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declare void @use_float(float)
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declare void @use_double(double)
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define void @test_csel(i32 %lhs32, i32 %rhs32, i64 %lhs64) {
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; CHECK-LABEL: test_csel:
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%tst1 = icmp ugt i32 %lhs32, %rhs32
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%val1 = select i1 %tst1, float 0.0, float 1.0
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store float %val1, float* @varfloat
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; CHECK-DAG: fmov s[[FLT0:[0-9]+]], wzr
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; CHECK-DAG: fmov s[[FLT1:[0-9]+]], #1.0
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; CHECK: fcsel {{s[0-9]+}}, s[[FLT0]], s[[FLT1]], hi
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%rhs64 = sext i32 %rhs32 to i64
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%tst2 = icmp sle i64 %lhs64, %rhs64
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%val2 = select i1 %tst2, double 1.0, double 0.0
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store double %val2, double* @vardouble
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; FLT0 is reused from above on ARM64.
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; CHECK: fmov d[[FLT1:[0-9]+]], #1.0
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; CHECK: fcsel {{d[0-9]+}}, d[[FLT1]], d[[FLT0]], le
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call void @use_float(float 0.0)
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call void @use_float(float 1.0)
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call void @use_double(double 0.0)
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call void @use_double(double 1.0)
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ret void
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; CHECK: ret
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}
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