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ce4aecc085
Second part of https://reviews.llvm.org/D40348. Revision r318436 has extended all constants feeding a store to 64 bits to allow for CSE on the SDAG. However, negative constants were zero extended which made the constant being loaded appear to be a positive value larger than 16 bits. This resulted in long sequences to materialize such constants rather than simply a "load immediate". This patch just sign-extends those updated constants so that they remain 16-bit signed immediates if they started out that way. llvm-svn: 320368
113 lines
3.2 KiB
LLVM
113 lines
3.2 KiB
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -O2 \
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; RUN: -ppc-gpr-icmps=all -ppc-asm-full-reg-names -mcpu=pwr8 < %s | FileCheck %s \
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; RUN: --implicit-check-not cmpw --implicit-check-not cmpd --implicit-check-not cmpl
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -O2 \
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; RUN: -ppc-gpr-icmps=all -ppc-asm-full-reg-names -mcpu=pwr8 < %s | FileCheck %s \
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; RUN: --implicit-check-not cmpw --implicit-check-not cmpd --implicit-check-not cmpl
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@glob = common local_unnamed_addr global i32 0, align 4
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; Function Attrs: norecurse nounwind readnone
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define signext i32 @test_igeui(i32 zeroext %a, i32 zeroext %b) {
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entry:
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%cmp = icmp uge i32 %a, %b
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%conv = zext i1 %cmp to i32
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ret i32 %conv
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; CHECK-LABEL: test_igeui:
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; CHECK: sub [[REG1:r[0-9]+]], r3, r4
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; CHECK-NEXT: rldicl [[REG2:r[0-9]+]], [[REG2]], 1, 63
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; CHECK-NEXT: xori r3, [[REG2]], 1
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; CHECK: blr
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}
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; Function Attrs: norecurse nounwind readnone
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define signext i32 @test_igeui_sext(i32 zeroext %a, i32 zeroext %b) {
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entry:
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%cmp = icmp uge i32 %a, %b
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%sub = sext i1 %cmp to i32
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ret i32 %sub
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; CHECK-LABEL: @test_igeui_sext
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; CHECK: sub [[REG1:r[0-9]+]], r3, r4
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; CHECK-NEXT: rldicl [[REG2:r[0-9]+]], [[REG1]], 1, 63
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; CHECK-NEXT: addi [[REG3:r[0-9]+]], [[REG2]], -1
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; CHECK-NEXT: blr
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}
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; Function Attrs: norecurse nounwind readnone
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define signext i32 @test_igeui_z(i32 zeroext %a) {
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entry:
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%cmp = icmp uge i32 %a, 0
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%sub = zext i1 %cmp to i32
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ret i32 %sub
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; CHECK-LABEL: @test_igeui_z
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; CHECK: li r3, 1
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; CHECK-NEXT: blr
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}
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; Function Attrs: norecurse nounwind readnone
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define signext i32 @test_igeui_sext_z(i32 zeroext %a) {
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entry:
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%cmp = icmp uge i32 %a, 0
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%sub = sext i1 %cmp to i32
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ret i32 %sub
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; CHECK-LABEL: @test_igeui_sext_z
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; CHECK: li r3, -1
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; CHECK-NEXT: blr
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}
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; Function Attrs: norecurse nounwind
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define void @test_igeui_store(i32 zeroext %a, i32 zeroext %b) {
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entry:
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%cmp = icmp uge i32 %a, %b
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%conv = zext i1 %cmp to i32
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store i32 %conv, i32* @glob
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ret void
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; CHECK_LABEL: test_igeuc_store:
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; CHECK: sub [[REG1:r[0-9]+]], r3, r4
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; CHECK: rldicl [[REG2:r[0-9]+]], [[REG2]], 1, 63
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; CHECK: xori {{r[0-9]+}}, [[REG2]], 1
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; CHECK: blr
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}
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; Function Attrs: norecurse nounwind
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define void @test_igeui_sext_store(i32 zeroext %a, i32 zeroext %b) {
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entry:
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%cmp = icmp uge i32 %a, %b
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%sub = sext i1 %cmp to i32
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store i32 %sub, i32* @glob
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ret void
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; CHECK-LABEL: @test_igeui_sext_store
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; CHECK: sub [[REG1:r[0-9]+]], r3, r4
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; CHECK: rldicl [[REG2:r[0-9]+]], [[REG1]], 1, 63
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; CHECK: addi [[REG3:r[0-9]+]], [[REG2]], -1
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; CHECK: stw [[REG3]]
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; CHECK: blr
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}
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; Function Attrs: norecurse nounwind
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define void @test_igeui_z_store(i32 zeroext %a) {
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entry:
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%cmp = icmp uge i32 %a, 0
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%conv1 = zext i1 %cmp to i32
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store i32 %conv1, i32* @glob
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ret void
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; CHECK-LABEL: @test_igeui_z_store
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; CHECK: li [[REG1:r[0-9]+]], 1
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; CHECK: stw [[REG1]]
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; CHECK: blr
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}
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; Function Attrs: norecurse nounwind
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define void @test_igeui_sext_z_store(i32 zeroext %a) {
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entry:
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%cmp = icmp uge i32 %a, 0
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%conv1 = sext i1 %cmp to i32
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store i32 %conv1, i32* @glob
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ret void
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; CHECK-LABEL: @test_igeui_sext_z_store
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; CHECK: li [[REG1:r[0-9]+]], -1
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; CHECK: stw [[REG1]]
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; CHECK: blr
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}
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