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
34 lines
906 B
LLVM
34 lines
906 B
LLVM
; Check that various LLVM idioms get lowered to NVPTX as expected.
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; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s
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; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s
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; RUN: %if ptxas %{ llc < %s -march=nvptx -mcpu=sm_20 | %ptxas-verify %}
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; RUN: %if ptxas %{ llc < %s -march=nvptx64 -mcpu=sm_20 | %ptxas-verify %}
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; CHECK-LABEL: abs_i16(
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define i16 @abs_i16(i16 %a) {
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; CHECK: abs.s16
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%neg = sub i16 0, %a
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%abs.cond = icmp sge i16 %a, 0
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%abs = select i1 %abs.cond, i16 %a, i16 %neg
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ret i16 %abs
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}
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; CHECK-LABEL: abs_i32(
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define i32 @abs_i32(i32 %a) {
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; CHECK: abs.s32
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%neg = sub i32 0, %a
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%abs.cond = icmp sge i32 %a, 0
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%abs = select i1 %abs.cond, i32 %a, i32 %neg
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ret i32 %abs
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}
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; CHECK-LABEL: abs_i64(
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define i64 @abs_i64(i64 %a) {
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; CHECK: abs.s64
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%neg = sub i64 0, %a
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%abs.cond = icmp sge i64 %a, 0
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%abs = select i1 %abs.cond, i64 %a, i64 %neg
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ret i64 %abs
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}
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