derek.holloway
7502bf64a4
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49 lines
1.5 KiB
LLVM
49 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature
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; RUN: opt -S -O3 -o - %s | FileCheck %s
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; PR44154: LLVM c3b06d0c393e caused the body of @main to be replaced with
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; unreachable. Check that we perform the expected calls and optimizations.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @main(i32 %argc, ptr %argv) #0 {
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; CHECK-LABEL: define {{[^@]+}}@main
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; CHECK-SAME: (i32 [[ARGC:%.*]], ptr readonly captures(none) [[ARGV:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = icmp slt i32 [[ARGC]], 2
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TMP0]], i32 0, i32 [[ARGC]]
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; CHECK-NEXT: ret i32 [[SPEC_SELECT]]
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;
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entry:
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%ptr = load ptr, ptr %argv
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%0 = call i32 @compute(ptr %ptr, i32 %argc)
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%1 = icmp slt i32 %argc, 2
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br i1 %1, label %done, label %do_work
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do_work:
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%2 = icmp eq ptr %ptr, null
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br i1 %2, label %null, label %done
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null:
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call void @call_if_null(ptr %ptr)
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br label %done
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done:
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%retval = phi i32 [0, %entry], [%0, %do_work], [%0, %null]
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ret i32 %retval
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}
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define i32 @compute(ptr noundef nonnull %ptr, i32 %x) #1 {
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; CHECK-LABEL: define {{[^@]+}}@compute
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; CHECK-SAME: (ptr noundef nonnull readnone captures(none) [[PTR:%.*]], i32 returned [[X:%.*]]) local_unnamed_addr #[[ATTR1:[0-9]+]] {
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; CHECK-NEXT: ret i32 [[X]]
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;
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ret i32 %x
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}
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declare void @call_if_null(ptr %ptr) #0
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attributes #0 = { nounwind }
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attributes #1 = { noinline nounwind readonly }
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