derek.holloway
7502bf64a4
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67 lines
1.8 KiB
LLVM
67 lines
1.8 KiB
LLVM
; RUN: opt -S --passes="ipsccp<func-spec>" -force-specialization < %s | FileCheck %s
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@A = private constant [6 x i32] [i32 1, i32 2, i32 0, i32 0, i32 0, i32 0], align 16
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@B = external global ptr, align 8
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define i32 @caller() {
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entry:
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%c1 = call fastcc i32 @func(ptr @f0, i32 0, ptr null)
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%c2 = call fastcc i32 @func(ptr @f1, i32 1, ptr @A)
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%c3 = call fastcc i32 @func(ptr @f2, i32 2, ptr @A)
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%add = add i32 %c1, %c2
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%sub = sub i32 %add, %c3
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ret i32 %sub
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}
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define internal fastcc i32 @func(ptr %f, i32 %N, ptr %A) {
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entry:
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switch i32 %N, label %sw.epilog [
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i32 2, label %sw.bb
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i32 1, label %sw.bb2
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i32 0, label %sw.bb4
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]
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sw.bb: ; preds = %entry
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%0 = getelementptr inbounds i32, ptr %A, i64 1
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%1 = load i32, ptr %0, align 4
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%2 = call i32 %f(i32 %1)
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br label %sw.epilog
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sw.bb2: ; preds = %entry
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%3 = load i32, ptr %A, align 4
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%4 = zext i32 %3 to i64
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%5 = call i32 %f(i64 %4)
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br label %sw.epilog
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sw.bb4: ; preds = %entry
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%6 = call i32 %f()
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br label %sw.epilog
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sw.epilog: ; preds = %sw.bb, %sw.bb2, %sw.bb4, %entry
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%7 = phi i32 [undef, %entry], [%2, %sw.bb], [%5, %sw.bb2], [%6, %sw.bb4]
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ret i32 %7
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}
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define i32 @f0() {
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%ld = load i32, ptr @B, align 4
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ret i32 %ld
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}
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define i32 @f1(i64 %offset) {
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%gep = getelementptr inbounds i32, ptr @B, i64 %offset
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%ld = load i32, ptr %gep, align 4
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ret i32 %ld
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}
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define i32 @f2(i32 %offset) {
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%zext = zext i32 %offset to i64
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%call = call i32 @f1(i64 %zext)
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ret i32 %call
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}
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; Tests that `func` has been specialized and it didn't cause compiler crash.
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; CHECK-DAG: func.specialized.1
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; CHECK-DAG: func.specialized.2
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; CHECK-DAG: func.specialized.3
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