0f1b5f115a
ptxas is a proprietary compiler from Nvidia that can compile PTX to machine code (SASS). It has a lot of diagnostics to catch errors in PTX, which can be used to verify PTX output from llc. Set -DPXTAS_EXECUTABLE=/path/to/ptxas CMake option to enable it. If this option is not set, then ptxas is substituted to true which effectively disables all ptxas RUN lines. LLVM_PTXAS_EXECUTABLE environment variable takes precedence over the CMake option, and allows to override ptxas executable that is used for LIT without complete re-configuration. Differential Revision: https://reviews.llvm.org/D121727
44 lines
1.5 KiB
LLVM
44 lines
1.5 KiB
LLVM
; RUN: llc < %s -march=nvptx -mcpu=sm_20 -fp-contract=fast -verify-machineinstrs | FileCheck %s
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; RUN: %if ptxas %{ llc < %s -march=nvptx -mcpu=sm_20 -fp-contract=fast -verify-machineinstrs | %ptxas-verify %}
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declare float @dummy_f32(float, float) #0
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declare double @dummy_f64(double, double) #0
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define ptx_device float @t1_f32(float %x, float %y, float %z) {
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; CHECK: fma.rn.f32 %f{{[0-9]+}}, %f{{[0-9]+}}, %f{{[0-9]+}}, %f{{[0-9]+}};
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; CHECK: ret;
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%a = fmul float %x, %y
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%b = fadd float %a, %z
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ret float %b
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}
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define ptx_device float @t2_f32(float %x, float %y, float %z, float %w) {
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; CHECK: fma.rn.f32 %f{{[0-9]+}}, %f{{[0-9]+}}, %f{{[0-9]+}}, %f{{[0-9]+}};
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; CHECK: fma.rn.f32 %f{{[0-9]+}}, %f{{[0-9]+}}, %f{{[0-9]+}}, %f{{[0-9]+}};
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; CHECK: ret;
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%a = fmul float %x, %y
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%b = fadd float %a, %z
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%c = fadd float %a, %w
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%d = call float @dummy_f32(float %b, float %c)
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ret float %d
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}
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define ptx_device double @t1_f64(double %x, double %y, double %z) {
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; CHECK: fma.rn.f64 %fd{{[0-9]+}}, %fd{{[0-9]+}}, %fd{{[0-9]+}}, %fd{{[0-9]+}};
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; CHECK: ret;
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%a = fmul double %x, %y
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%b = fadd double %a, %z
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ret double %b
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}
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define ptx_device double @t2_f64(double %x, double %y, double %z, double %w) {
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; CHECK: fma.rn.f64 %fd{{[0-9]+}}, %fd{{[0-9]+}}, %fd{{[0-9]+}}, %fd{{[0-9]+}};
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; CHECK: fma.rn.f64 %fd{{[0-9]+}}, %fd{{[0-9]+}}, %fd{{[0-9]+}}, %fd{{[0-9]+}};
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; CHECK: ret;
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%a = fmul double %x, %y
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%b = fadd double %a, %z
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%c = fadd double %a, %w
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%d = call double @dummy_f64(double %b, double %c)
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ret double %d
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}
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