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[Hexagon] Emit lookup tables in text section based on a flag
The flag "-hexagon-emit-lut-text" (defaulted to false) is added to decide on where to keep the switch generated lookup table. Differential Revision: https://reviews.llvm.org/D34818 llvm-svn: 308316
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Sumanth Gundapaneni
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Jul 18, 2017
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;RUN: llc -O2 -hexagon-emit-lut-text=true < %s | FileCheck --check-prefix=FUNCTEXT %s | ||
;RUN: llc -O2 -hexagon-emit-lut-text=true -function-sections < %s | FileCheck --check-prefix=FUNCTEXT %s | ||
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;This test checks the placement of lookup table in explicit section from the attribute set. | ||
target datalayout = "e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048" | ||
target triple = "hexagon-unknown--elf" | ||
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;FUNCTEXT: .text | ||
;FUNCTEXT: .section{{.*}}tcm.hexagon, | ||
;FUNCTEXT-NOT: .section{{.*}}.rodata | ||
;FUNCTEXT-NOT: .text | ||
;FUNCTEXT: .Lswitch.table: | ||
;FUNCTEXT-NEXT: .word | ||
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@switch.table = private unnamed_addr constant [9 x i32] [i32 9, i32 20, i32 14, i32 22, i32 12, i32 5, i32 98, i32 8, i32 11] #0 | ||
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; Function Attrs: norecurse nounwind readnone | ||
define i32 @foo(i32 %x) local_unnamed_addr #0 section "tcm.hexagon" { | ||
entry: | ||
%0 = icmp ult i32 %x, 9 | ||
br i1 %0, label %switch.lookup, label %return | ||
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switch.lookup: ; preds = %entry | ||
%switch.gep = getelementptr inbounds [9 x i32], [9 x i32]* @switch.table, i32 0, i32 %x | ||
%switch.load = load i32, i32* %switch.gep, align 4 | ||
ret i32 %switch.load | ||
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return: ; preds = %entry | ||
ret i32 19 | ||
} | ||
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attributes #0 = { norecurse nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="hexagonv60" "target-features"="-hvx-double,-long-calls" "unsafe-fp-math"="false" "use-soft-float"="false" } |
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;RUN: llc -O2 -hexagon-emit-lut-text=true -function-sections < %s | FileCheck --check-prefix=FUNCTEXT %s | ||
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;This test checks the placement of lookup table in function's text section. | ||
target datalayout = "e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048" | ||
target triple = "hexagon-unknown--elf" | ||
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;FUNCTEXT: .text | ||
;FUNCTEXT: .section{{.*}}text.foo, | ||
;FUNCTEXT-NOT: .section{{.*}}.rodata | ||
;FUNCTEXT: .Lswitch.table: | ||
;FUNCTEXT-NEXT: .word | ||
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@switch.table = private unnamed_addr constant [9 x i32] [i32 9, i32 20, i32 14, i32 22, i32 12, i32 5, i32 98, i32 8, i32 11] #0 | ||
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; Function Attrs: norecurse nounwind readnone | ||
define i32 @foo(i32 %x) local_unnamed_addr #0 { | ||
entry: | ||
%0 = icmp ult i32 %x, 9 | ||
br i1 %0, label %switch.lookup, label %return | ||
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switch.lookup: ; preds = %entry | ||
%switch.gep = getelementptr inbounds [9 x i32], [9 x i32]* @switch.table, i32 0, i32 %x | ||
%switch.load = load i32, i32* %switch.gep, align 4 | ||
ret i32 %switch.load | ||
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return: ; preds = %entry | ||
ret i32 19 | ||
} | ||
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attributes #0 = { norecurse nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="hexagonv60" "target-features"="-hvx-double,-long-calls" "unsafe-fp-math"="false" "use-soft-float"="false" } |
42 changes: 42 additions & 0 deletions
42
llvm/test/CodeGen/Hexagon/switch-lut-multiple-functions.ll
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;RUN: llc -O2 -hexagon-emit-lut-text=true < %s | FileCheck --check-prefix=TEXT %s | ||
;If the look up table is used by more than one function, we should ignore the | ||
;flag and place it the rodata. | ||
target datalayout = "e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048" | ||
target triple = "hexagon-unknown--elf" | ||
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;TEXT: .text | ||
;TEXT: .section{{.*}}.rodata | ||
;TEXT: .Lswitch.table: | ||
;TEXT-NEXT: .word | ||
@switch.table = private unnamed_addr constant [9 x i32] [i32 9, i32 20, i32 14, i32 22, i32 12, i32 5, i32 98, i32 8, i32 11] | ||
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; Function Attrs: norecurse nounwind readnone | ||
define i32 @foo(i32 %x) local_unnamed_addr #0 { | ||
entry: | ||
%0 = icmp ult i32 %x, 9 | ||
br i1 %0, label %switch.lookup, label %return | ||
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switch.lookup: ; preds = %entry | ||
%switch.gep = getelementptr inbounds [9 x i32], [9 x i32]* @switch.table, i32 0, i32 %x | ||
%switch.load = load i32, i32* %switch.gep, align 4 | ||
ret i32 %switch.load | ||
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return: ; preds = %entry | ||
ret i32 19 | ||
} | ||
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define i32 @goo(i32 %x) local_unnamed_addr #0 { | ||
entry: | ||
%0 = icmp ult i32 %x, 9 | ||
br i1 %0, label %switch.lookup, label %return | ||
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switch.lookup: ; preds = %entry | ||
%switch.gep = getelementptr inbounds [9 x i32], [9 x i32]* @switch.table, i32 0, i32 %x | ||
%switch.load = load i32, i32* %switch.gep, align 4 | ||
ret i32 %switch.load | ||
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return: ; preds = %entry | ||
ret i32 19 | ||
} | ||
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attributes #0 = { norecurse nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="hexagonv60" "target-features"="-hvx-double,-long-calls" "unsafe-fp-math"="false" "use-soft-float"="false" } |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,27 @@ | ||
;RUN: llc -O2 -hexagon-emit-lut-text=true < %s | FileCheck --check-prefix=TEXT %s | ||
;This test checks the placement of lookup table in text section. | ||
target datalayout = "e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048" | ||
target triple = "hexagon-unknown--elf" | ||
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;TEXT: .text | ||
;TEXT-NOT: .section{{.*}}.rodata | ||
;TEXT: .Lswitch.table: | ||
;TEXT-NEXT: .word | ||
@switch.table = private unnamed_addr constant [9 x i32] [i32 9, i32 20, i32 14, i32 22, i32 12, i32 5, i32 98, i32 8, i32 11] | ||
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; Function Attrs: norecurse nounwind readnone | ||
define i32 @foo(i32 %x) local_unnamed_addr #0 { | ||
entry: | ||
%0 = icmp ult i32 %x, 9 | ||
br i1 %0, label %switch.lookup, label %return | ||
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switch.lookup: ; preds = %entry | ||
%switch.gep = getelementptr inbounds [9 x i32], [9 x i32]* @switch.table, i32 0, i32 %x | ||
%switch.load = load i32, i32* %switch.gep, align 4 | ||
ret i32 %switch.load | ||
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return: ; preds = %entry | ||
ret i32 19 | ||
} | ||
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attributes #0 = { norecurse nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="hexagonv60" "target-features"="-hvx-double,-long-calls" "unsafe-fp-math"="false" "use-soft-float"="false" } |