61 lines
1.5 KiB
LLVM
61 lines
1.5 KiB
LLVM
; RUN: opt -scalar-evolution -analyze -enable-new-pm=0 < %s | FileCheck %s
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; RUN: opt "-passes=print<scalar-evolution>" -disable-output < %s 2>&1 | FileCheck %s
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define void @test1(i8 %t, i32 %len) {
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; CHECK-LABEL: test1
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; CHECK: %sphi = phi i32 [ %ext, %entry ], [ %idx.inc.ext, %loop ]
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; CHECK-NEXT: --> (zext i8 {%t,+,1}<%loop> to i32)
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entry:
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%st = zext i8 %t to i16
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%ext = zext i8 %t to i32
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%ecmp = icmp ult i16 %st, 42
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br i1 %ecmp, label %loop, label %exit
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loop:
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%idx = phi i8 [ %t, %entry ], [ %idx.inc, %loop ]
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%sphi = phi i32 [ %ext, %entry ], [%idx.inc.ext, %loop]
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%idx.inc = add i8 %idx, 1
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%idx.inc.ext = zext i8 %idx.inc to i32
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%idx.ext = zext i8 %idx to i32
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%c = icmp ult i32 %idx.inc.ext, %len
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br i1 %c, label %loop, label %exit
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exit:
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ret void
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}
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define void @test2(i8 %t, i32 %len) {
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; CHECK-LABEL: test2
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; CHECK: %sphi = phi i32 [ %ext.mul, %entry ], [ %mul, %loop ]
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; CHECK-NEXT: --> (4 * (zext i8 {%t,+,1}<%loop> to i32))
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entry:
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%st = zext i8 %t to i16
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%ext = zext i8 %t to i32
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%ext.mul = mul i32 %ext, 4
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%ecmp = icmp ult i16 %st, 42
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br i1 %ecmp, label %loop, label %exit
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loop:
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%idx = phi i8 [ %t, %entry ], [ %idx.inc, %loop ]
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%sphi = phi i32 [ %ext.mul, %entry ], [%mul, %loop]
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%idx.inc = add i8 %idx, 1
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%idx.inc.ext = zext i8 %idx.inc to i32
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%mul = mul i32 %idx.inc.ext, 4
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%idx.ext = zext i8 %idx to i32
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%c = icmp ult i32 %idx.inc.ext, %len
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br i1 %c, label %loop, label %exit
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exit:
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ret void
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}
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