[PowerPC] Eliminate compares - add i32 sext/zext handling for SETULT/SETUGT

As mentioned in https://reviews.llvm.org/D33718, this simply adds another
pattern to the compare elimination sequence and is committed without a
differential revision.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@314062 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 117 insertions, 0 deletions

diff --git a/test/CodeGen/PowerPC/testComparesigtus.ll b/test/CodeGen/PowerPC/testComparesigtus.ll
new file mode 100644
index 00000000000..2f652b8661c
--- /dev/null
+++ b/test/CodeGen/PowerPC/testComparesigtus.ll
@@ -0,0 +1,117 @@
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -O2 \
+; RUN:   -ppc-asm-full-reg-names -mcpu=pwr8 < %s | FileCheck %s \
+; RUN:  --implicit-check-not cmpw --implicit-check-not cmpd --implicit-check-not cmpl
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -O2 \
+; RUN:   -ppc-asm-full-reg-names -mcpu=pwr8 < %s | FileCheck %s \
+; RUN:  --implicit-check-not cmpw --implicit-check-not cmpd --implicit-check-not cmpl
+
+@glob = common local_unnamed_addr global i16 0, align 2
+
+; Function Attrs: norecurse nounwind readnone
+define signext i32 @test_igtus(i16 zeroext %a, i16 zeroext %b) {
+; CHECK-LABEL: test_igtus:
+; CHECK:    sub [[REG:r[0-9]+]], r4, r3
+; CHECK-NEXT:    rldicl r3, [[REG]], 1, 63
+; CHECK-NEXT:    blr
+entry:
+  %cmp = icmp ugt i16 %a, %b
+  %conv2 = zext i1 %cmp to i32
+  ret i32 %conv2
+}
+
+; Function Attrs: norecurse nounwind readnone
+define signext i32 @test_igtus_sext(i16 zeroext %a, i16 zeroext %b) {
+; CHECK-LABEL: test_igtus_sext:
+; CHECK:    sub [[REG:r[0-9]+]], r4, r3
+; CHECK-NEXT:    sradi r3, [[REG]], 63
+; CHECK-NEXT:    blr
+entry:
+  %cmp = icmp ugt i16 %a, %b
+  %sub = sext i1 %cmp to i32
+  ret i32 %sub
+}
+
+; Function Attrs: norecurse nounwind readnone
+define signext i32 @test_igtus_z(i16 zeroext %a) {
+; CHECK-LABEL: test_igtus_z:
+; CHECK:    cntlzw r3, r3
+; CHECK-NEXT:    srwi r3, r3, 5
+; CHECK-NEXT:    xori r3, r3, 1
+; CHECK-NEXT:    blr
+entry:
+  %cmp = icmp ne i16 %a, 0
+  %conv1 = zext i1 %cmp to i32
+  ret i32 %conv1
+}
+
+; Function Attrs: norecurse nounwind readnone
+define signext i32 @test_igtus_sext_z(i16 zeroext %a) {
+; CHECK-LABEL: test_igtus_sext_z:
+; CHECK:    cntlzw r3, r3
+; CHECK-NEXT:    srwi r3, r3, 5
+; CHECK-NEXT:    xori r3, r3, 1
+; CHECK-NEXT:    neg r3, r3
+; CHECK-NEXT:    blr
+entry:
+  %cmp = icmp ne i16 %a, 0
+  %sub = sext i1 %cmp to i32
+  ret i32 %sub
+}
+
+; Function Attrs: norecurse nounwind
+define void @test_igtus_store(i16 zeroext %a, i16 zeroext %b) {
+; CHECK-LABEL: test_igtus_store:
+; CHECK:         sub [[REG:r[0-9]+]], r4, r3
+; CHECK:         rldicl {{r[0-9]+}}, [[REG]], 1, 63
+; CHECK:         blr
+entry:
+  %cmp = icmp ugt i16 %a, %b
+  %conv3 = zext i1 %cmp to i16
+  store i16 %conv3, i16* @glob, align 2
+  ret void
+}
+
+; Function Attrs: norecurse nounwind
+define void @test_igtus_sext_store(i16 zeroext %a, i16 zeroext %b) {
+; CHECK-LABEL: test_igtus_sext_store:
+; CHECK:         sub [[REG:r[0-9]+]], r4, r3
+; CHECK:         sradi {{r[0-9]+}}, [[REG]], 63
+; CHECK:         blr
+entry:
+  %cmp = icmp ugt i16 %a, %b
+  %conv3 = sext i1 %cmp to i16
+  store i16 %conv3, i16* @glob, align 2
+  ret void
+}
+
+; Function Attrs: norecurse nounwind
+define void @test_igtus_z_store(i16 zeroext %a) {
+; CHECK-LABEL: test_igtus_z_store:
+; CHECK:    cntlzw r3, r3
+; CHECK:    srwi r3, r3, 5
+; CHECK:    xori r3, r3, 1
+; CHECK:    sth r3, 0(r4)
+; CHECK-NEXT:    blr
+entry:
+  %cmp = icmp ne i16 %a, 0
+  %conv2 = zext i1 %cmp to i16
+  store i16 %conv2, i16* @glob, align 2
+  ret void
+}
+
+; Function Attrs: norecurse nounwind
+define void @test_igtus_sext_z_store(i16 zeroext %a) {
+; CHECK-LABEL: test_igtus_sext_z_store:
+; CHECK:    cntlzw r3, r3
+; CHECK:    srwi r3, r3, 5
+; CHECK:    xori r3, r3, 1
+; CHECK:    neg r3, r3
+; CHECK:    sth r3, 0(r4)
+; CHECK-NEXT:    blr
+entry:
+  %cmp = icmp ne i16 %a, 0
+  %conv2 = sext i1 %cmp to i16
+  store i16 %conv2, i16* @glob, align 2
+  ret void
+}
+