[PowerPC] [Constant Hoisting] Enable constant hoisting on PPC

[oota-llvm.git] / test / Transforms / ConstantHoisting / PowerPC / masks.ll

diff --git a/test/Transforms/ConstantHoisting/PowerPC/masks.ll b/test/Transforms/ConstantHoisting/PowerPC/masks.ll
new file mode 100644 (file)
index 0000000..d553182
--- /dev/null
+++ b/test/Transforms/ConstantHoisting/PowerPC/masks.ll
@@ -0,0 +1,66 @@
+; RUN: opt -S -consthoist < %s | FileCheck %s
+target datalayout = "E-m:e-i64:64-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+; Here the masks are all contiguous, and should not be hoisted.
+define i32 @test1() nounwind {
+entry:
+; CHECK-LABEL:  @test1
+; CHECK-NOT: bitcast i32 65535 to i32
+; CHECK: and i32 undef, 65535
+  %conv121 = and i32 undef, 65535
+  br i1 undef, label %if.then152, label %if.end167
+
+if.then152:
+; CHECK: and i32 undef, 65535
+  %conv153 = and i32 undef, 65535
+  br i1 undef, label %if.end167, label %end2
+
+if.end167:
+; CHECK: and i32 {{.*}}, 32768
+  %shl161 = shl nuw nsw i32 %conv121, 15
+  %0 = load i8* undef, align 1
+  %conv169 = zext i8 %0 to i32
+  %shl170 = shl nuw nsw i32 %conv169, 7
+  %shl161.masked = and i32 %shl161, 32768
+  %conv174 = or i32 %shl170, %shl161.masked
+  %cmp178 = icmp ugt i32 %conv174, 32767
+  br i1 %cmp178, label %end1, label %end2
+
+end1:
+  unreachable
+
+end2:
+  unreachable
+}
+
+; Here the masks are not contiguous, and should be hoisted.
+define i32 @test2() nounwind {
+entry:
+; CHECK-LABEL: @test2
+; CHECK: bitcast i32 65531 to i32
+  %conv121 = and i32 undef, 65531
+  br i1 undef, label %if.then152, label %if.end167
+
+if.then152:
+  %conv153 = and i32 undef, 65531
+  br i1 undef, label %if.end167, label %end2
+
+if.end167:
+; CHECK: add i32 {{.*}}, -32758
+  %shl161 = shl nuw nsw i32 %conv121, 15
+  %0 = load i8* undef, align 1
+  %conv169 = zext i8 %0 to i32
+  %shl170 = shl nuw nsw i32 %conv169, 7
+  %shl161.masked = and i32 %shl161, 32773
+  %conv174 = or i32 %shl170, %shl161.masked
+  %cmp178 = icmp ugt i32 %conv174, 32767
+  br i1 %cmp178, label %end1, label %end2
+
+end1:
+  unreachable
+
+end2:
+  unreachable
+}
+