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Diffstat (limited to 'test/CodeGen/X86/divide-by-constant.ll')
-rw-r--r-- | test/CodeGen/X86/divide-by-constant.ll | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/test/CodeGen/X86/divide-by-constant.ll b/test/CodeGen/X86/divide-by-constant.ll new file mode 100644 index 0000000..6b423a1 --- /dev/null +++ b/test/CodeGen/X86/divide-by-constant.ll @@ -0,0 +1,42 @@ +; RUN: llc < %s -mtriple=i686-pc-linux-gnu -asm-verbose=0 | FileCheck %s +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32" +target triple = "i686-pc-linux-gnu" + +define zeroext i16 @test1(i16 zeroext %x) nounwind { +entry: + %div = udiv i16 %x, 33 + ret i16 %div +; CHECK: test1: +; CHECK: imull $63551, %eax, %eax +; CHECK-NEXT: shrl $21, %eax +; CHECK-NEXT: ret +} + +define zeroext i16 @test2(i8 signext %x, i16 zeroext %c) nounwind readnone ssp noredzone { +entry: + %div = udiv i16 %c, 3 + ret i16 %div + +; CHECK: test2: +; CHECK: imull $43691, %eax, %eax +; CHECK-NEXT: shrl $17, %eax +; CHECK-NEXT: ret +} + +define zeroext i8 @test3(i8 zeroext %x, i8 zeroext %c) nounwind readnone ssp noredzone { +entry: + %div = udiv i8 %c, 3 + ret i8 %div + +; CHECK: test3: +; CHECK: imull $171, %eax, %eax +; CHECK-NEXT: shrb %ah +; CHECK-NEXT: movzbl %ah, %eax +; CHECK-NEXT: ret +} + +define signext i16 @test4(i16 signext %x) nounwind { +entry: + %div = sdiv i16 %x, 33 ; <i32> [#uses=1] + ret i16 %div +} |