e3cf80c5c1
BlockFrequencyInfo calculates block frequencies as Scaled64 numbers but as a last step converts them to unsigned 64bit integers (`BlockFrequency`). This improves the factors picked for this conversion so that: * Avoid big numbers close to UINT64_MAX to avoid users overflowing/saturating when adding multiply frequencies together or when multiplying with integers. This leaves the topmost 10 bits unused to allow for some room. * Spread the difference between hottest/coldest block as much as possible to increase precision. * If the hot/cold spread cannot be represented loose precision at the lower end, but keep the frequencies at the upper end for hot blocks differentiable.
174 lines
5.3 KiB
LLVM
174 lines
5.3 KiB
LLVM
; RUN: llc -mtriple powerpc-ibm-aix-xcoff -ppc-min-jump-table-entries=4 -code-model=small < %s | FileCheck \
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; RUN: --check-prefixes=32SMALL-ASM,SMALL-ASM %s
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; RUN: llc -mtriple powerpc-ibm-aix-xcoff -ppc-min-jump-table-entries=4 -code-model=large < %s | FileCheck \
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; RUN: --check-prefixes=32LARGE-ASM,LARGE-ASM %s
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; RUN: llc -mtriple powerpc64-ibm-aix-xcoff -ppc-min-jump-table-entries=4 -code-model=small < %s | FileCheck \
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; RUN: --check-prefixes=64SMALL-ASM,SMALL-ASM %s
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; RUN: llc -mtriple powerpc64-ibm-aix-xcoff -ppc-min-jump-table-entries=4 -code-model=large < %s | FileCheck \
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; RUN: --check-prefixes=64LARGE-ASM,LARGE-ASM %s
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; RUN: llc -mtriple powerpc-ibm-aix-xcoff -ppc-min-jump-table-entries=4 -function-sections < %s | FileCheck \
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; RUN: --check-prefix=FUNC-ASM %s
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; RUN: llc -mtriple powerpc64-ibm-aix-xcoff -ppc-min-jump-table-entries=4 -function-sections < %s | FileCheck \
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; RUN: --check-prefix=FUNC-ASM %s
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define i32 @jump_table(i32 %a) {
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entry:
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switch i32 %a, label %sw.epilog [
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i32 1, label %sw.bb
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i32 2, label %sw.bb1
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i32 3, label %sw.bb2
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i32 4, label %sw.bb3
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]
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sw.bb:
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tail call void asm sideeffect "", ""()
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br label %sw.epilog
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sw.bb1:
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tail call void asm sideeffect "", ""()
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br label %sw.epilog
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sw.bb2:
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tail call void asm sideeffect "", ""()
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br label %sw.epilog
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sw.bb3:
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tail call void asm sideeffect "", ""()
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br label %sw.epilog
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sw.epilog:
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ret i32 0
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}
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; 32SMALL-ASM-LABEL: jump_table
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; 32SMALL-ASM: .jump_table:
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; 32SMALL-ASM: addi 3, 3, -1
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; 32SMALL-ASM: cmplwi 3, 3
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; 32SMALL-ASM: bgt 0, L..BB0_3
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; 32SMALL-ASM: lwz 4, L..C0(2)
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; 32SMALL-ASM: slwi 3, 3, 2
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; 32SMALL-ASM: lwzx 3, 3, 4
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; 32SMALL-ASM: add 3, 3, 4
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; 32SMALL-ASM: mtctr 3
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; 32SMALL-ASM: bctr
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; 32SMALL-ASM: L..BB0_2:
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; 32SMALL-ASM: L..BB0_3:
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; 32SMALL-ASM: L..BB0_4:
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; 32SMALL-ASM: L..BB0_5:
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; 32SMALL-ASM: L..BB0_6:
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; 32SMALL-ASM: li 3, 0
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; 32SMALL-ASM: blr
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; 32SMALL-ASM: .csect .rodata[RO],2
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; 32SMALL-ASM: .align 2
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; 32SMALL-ASM: L..JTI0_0:
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; 32SMALL-ASM: .vbyte 4, L..BB0_2-L..JTI0_0
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; 32SMALL-ASM: .vbyte 4, L..BB0_6-L..JTI0_0
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; 32SMALL-ASM: .vbyte 4, L..BB0_4-L..JTI0_0
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; 32SMALL-ASM: .vbyte 4, L..BB0_5-L..JTI0_0
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; 32LARGE-ASM-LABEL: jump_table
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; 32LARGE-ASM: .jump_table:
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; 32LARGE-ASM: addi 3, 3, -1
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; 32LARGE-ASM: cmplwi 3, 3
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; 32LARGE-ASM: bgt 0, L..BB0_3
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; 32LARGE-ASM: addis 4, L..C0@u(2)
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; 32LARGE-ASM: slwi 3, 3, 2
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; 32LARGE-ASM: lwz 4, L..C0@l(4)
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; 32LARGE-ASM: lwzx 3, 3, 4
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; 32LARGE-ASM: add 3, 3, 4
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; 32LARGE-ASM: mtctr 3
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; 32LARGE-ASM: bctr
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; 32LARGE-ASM: L..BB0_2:
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; 32LARGE-ASM: L..BB0_3:
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; 32LARGE-ASM: L..BB0_4:
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; 32LARGE-ASM: L..BB0_5:
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; 32LARGE-ASM: L..BB0_6:
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; 32LARGE-ASM: li 3, 0
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; 32LARGE-ASM: blr
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; 32LARGE-ASM: .csect .rodata[RO],2
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; 32LARGE-ASM: .align 2
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; 32LARGE-ASM: L..JTI0_0:
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; 32LARGE-ASM: .vbyte 4, L..BB0_2-L..JTI0_0
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; 32LARGE-ASM: .vbyte 4, L..BB0_6-L..JTI0_0
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; 32LARGE-ASM: .vbyte 4, L..BB0_4-L..JTI0_0
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; 32LARGE-ASM: .vbyte 4, L..BB0_5-L..JTI0_0
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; 64SMALL-ASM-LABEL: jump_table
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; 64SMALL-ASM: .jump_table:
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; 64SMALL-ASM: addi 3, 3, -1
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; 64SMALL-ASM: cmplwi 3, 3
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; 64SMALL-ASM: bgt 0, L..BB0_3
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; 64SMALL-ASM: ld 4, L..C0(2)
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; 64SMALL-ASM: rldic 3, 3, 2, 30
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; 64SMALL-ASM: lwax 3, 3, 4
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; 64SMALL-ASM: add 3, 3, 4
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; 64SMALL-ASM: mtctr 3
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; 64SMALL-ASM: bctr
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; 64SMALL-ASM: L..BB0_2:
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; 64SMALL-ASM: L..BB0_3:
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; 64SMALL-ASM: L..BB0_4:
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; 64SMALL-ASM: L..BB0_5:
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; 64SMALL-ASM: L..BB0_6:
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; 64SMALL-ASM: li 3, 0
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; 64SMALL-ASM: blr
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; 64SMALL-ASM: .csect .rodata[RO],2
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; 64SMALL-ASM: .align 2
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; 64SMALL-ASM: L..JTI0_0:
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; 64SMALL-ASM: .vbyte 4, L..BB0_2-L..JTI0_0
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; 64SMALL-ASM: .vbyte 4, L..BB0_6-L..JTI0_0
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; 64SMALL-ASM: .vbyte 4, L..BB0_4-L..JTI0_0
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; 64SMALL-ASM: .vbyte 4, L..BB0_5-L..JTI0_0
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; 64LARGE-ASM-LABEL: jump_table
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; 64LARGE-ASM: .jump_table:
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; 64LARGE-ASM: addi 3, 3, -1
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; 64LARGE-ASM: cmplwi 3, 3
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; 64LARGE-ASM: bgt 0, L..BB0_3
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; 64LARGE-ASM: addis 4, L..C0@u(2)
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; 64LARGE-ASM: rldic 3, 3, 2, 30
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; 64LARGE-ASM: ld 4, L..C0@l(4)
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; 64LARGE-ASM: lwax 3, 3, 4
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; 64LARGE-ASM: add 3, 3, 4
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; 64LARGE-ASM: mtctr 3
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; 64LARGE-ASM: bctr
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; 64LARGE-ASM: L..BB0_2:
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; 64LARGE-ASM: L..BB0_3:
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; 64LARGE-ASM: L..BB0_4:
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; 64LARGE-ASM: L..BB0_5:
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; 64LARGE-ASM: L..BB0_6:
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; 64LARGE-ASM: li 3, 0
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; 64LARGE-ASM: blr
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; 64LARGE-ASM: .csect .rodata[RO],2
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; 64LARGE-ASM: .align 2
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; 64LARGE-ASM: L..JTI0_0:
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; 64LARGE-ASM: .vbyte 4, L..BB0_2-L..JTI0_0
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; 64LARGE-ASM: .vbyte 4, L..BB0_6-L..JTI0_0
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; 64LARGE-ASM: .vbyte 4, L..BB0_4-L..JTI0_0
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; 64LARGE-ASM: .vbyte 4, L..BB0_5-L..JTI0_0
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; FUNC-ASM: .csect .jump_table[PR],5
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; FUNC-ASM: L..BB0_2:
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; FUNC-ASM: L..BB0_3:
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; FUNC-ASM: L..BB0_4:
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; FUNC-ASM: L..BB0_5:
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; FUNC-ASM: L..BB0_6:
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; FUNC-ASM: li 3, 0
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; FUNC-ASM: blr
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; FUNC-ASM: .csect .rodata.jmp..jump_table[RO],2
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; FUNC-ASM: .align 2
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; FUNC-ASM: L..JTI0_0:
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; FUNC-ASM: .vbyte 4, L..BB0_2-L..JTI0_0
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; FUNC-ASM: .vbyte 4, L..BB0_6-L..JTI0_0
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; FUNC-ASM: .vbyte 4, L..BB0_4-L..JTI0_0
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; FUNC-ASM: .vbyte 4, L..BB0_5-L..JTI0_0
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; SMALL-ASM: .toc
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; SMALL-ASM: .tc L..JTI0_0[TC],L..JTI0_0
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; LARGE-ASM: .toc
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; LARGE-ASM: .tc L..JTI0_0[TE],L..JTI0_0
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