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- `Attr.td` - Define the HLSL loop attribute hints (unroll and loop) - `AttrDocs.td` - Add documentation for unroll and loop - `CGLoopInfo.cpp` - Add codegen for HLSL unroll that maps to clang unroll expectations - `ParseStmt.cpp` - For statements if HLSL define DeclSpecAttrs via MaybeParseMicrosoftAttributes - `SemaStmtAttr.cpp` - Add the HLSL loop unroll handeling
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Original file line number | Diff line number | Diff line change |
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// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -x hlsl -triple \ | ||
// RUN: dxil-pc-shadermodel6.3-library %s -emit-llvm -o - | FileCheck %s | ||
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/*** for ***/ | ||
void for_count() | ||
{ | ||
// CHECK-LABEL: for_count | ||
[unroll(8)] | ||
for( int i = 0; i < 1000; ++i); | ||
// CHECK: br label %{{.*}}, !llvm.loop ![[FOR_DISTINCT:.*]] | ||
} | ||
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void for_disable() | ||
{ | ||
// CHECK-LABEL: for_disable | ||
[loop] | ||
for( int i = 0; i < 1000; ++i); | ||
// CHECK: br label %{{.*}}, !llvm.loop ![[FOR_DISABLE:.*]] | ||
} | ||
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void for_enable() | ||
{ | ||
// CHECK-LABEL: for_enable | ||
[unroll] | ||
for( int i = 0; i < 1000; ++i); | ||
// CHECK: br label %{{.*}}, !llvm.loop ![[FOR_ENABLE:.*]] | ||
} | ||
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/*** while ***/ | ||
void while_count() | ||
{ | ||
// CHECK-LABEL: while_count | ||
int i = 1000; | ||
[unroll(4)] | ||
while(i-->0); | ||
// CHECK: br label %{{.*}}, !llvm.loop ![[WHILE_DISTINCT:.*]] | ||
} | ||
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void while_disable() | ||
{ | ||
// CHECK-LABEL: while_disable | ||
int i = 1000; | ||
[loop] | ||
while(i-->0); | ||
// CHECK: br label %{{.*}}, !llvm.loop ![[WHILE_DISABLE:.*]] | ||
} | ||
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void while_enable() | ||
{ | ||
// CHECK-LABEL: while_enable | ||
int i = 1000; | ||
[unroll] | ||
while(i-->0); | ||
// CHECK: br label %{{.*}}, !llvm.loop ![[WHILE_ENABLE:.*]] | ||
} | ||
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/*** do ***/ | ||
void do_count() | ||
{ | ||
// CHECK-LABEL: do_count | ||
int i = 1000; | ||
[unroll(16)] | ||
do {} while(i--> 0); | ||
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !llvm.loop ![[DO_DISTINCT:.*]] | ||
} | ||
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void do_disable() | ||
{ | ||
// CHECK-LABEL: do_disable | ||
int i = 1000; | ||
[loop] | ||
do {} while(i--> 0); | ||
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !llvm.loop ![[DO_DISABLE:.*]] | ||
} | ||
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void do_enable() | ||
{ | ||
// CHECK-LABEL: do_enable | ||
int i = 1000; | ||
[unroll] | ||
do {} while(i--> 0); | ||
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !llvm.loop ![[DO_ENABLE:.*]] | ||
} | ||
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// CHECK: ![[FOR_DISTINCT]] = distinct !{![[FOR_DISTINCT]], ![[FOR_COUNT:.*]]} | ||
// CHECK: ![[FOR_COUNT]] = !{!"llvm.loop.unroll.count", i32 8} | ||
// CHECK: ![[FOR_DISABLE]] = distinct !{![[FOR_DISABLE]], ![[DISABLE:.*]]} | ||
// CHECK: ![[DISABLE]] = !{!"llvm.loop.unroll.disable"} | ||
// CHECK: ![[FOR_ENABLE]] = distinct !{![[FOR_ENABLE]], ![[ENABLE:.*]]} | ||
// CHECK: ![[ENABLE]] = !{!"llvm.loop.unroll.enable"} | ||
// CHECK: ![[WHILE_DISTINCT]] = distinct !{![[WHILE_DISTINCT]], ![[WHILE_COUNT:.*]]} | ||
// CHECK: ![[WHILE_COUNT]] = !{!"llvm.loop.unroll.count", i32 4} | ||
// CHECK: ![[WHILE_DISABLE]] = distinct !{![[WHILE_DISABLE]], ![[DISABLE]]} | ||
// CHECK: ![[WHILE_ENABLE]] = distinct !{![[WHILE_ENABLE]], ![[ENABLE]]} | ||
// CHECK: ![[DO_DISTINCT]] = distinct !{![[DO_DISTINCT]], ![[DO_COUNT:.*]]} | ||
// CHECK: ![[DO_COUNT]] = !{!"llvm.loop.unroll.count", i32 16} | ||
// CHECK: ![[DO_DISABLE]] = distinct !{![[DO_DISABLE]], ![[DISABLE]]} | ||
// CHECK: ![[DO_ENABLE]] = distinct !{![[DO_ENABLE]], ![[ENABLE]]} |