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When the target option GuaranteedTailCallOpt is specified, calls with the fastcc calling convention will be transformed into tail calls if they are in tail position. This diff adds a new calling convention, tailcc, currently supported only on X86, which behaves the same way as fastcc, except that the GuaranteedTailCallOpt flag does not need to enabled in order to enable tail call optimization. Patch by Dwight Guth <dwight.guth@runtimeverification.com>! Reviewed By: lebedev.ri, paquette, rnk Differential Revision: https://reviews.llvm.org/D67855 llvm-svn: 373976
19 lines
592 B
LLVM
19 lines
592 B
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin -fast-isel -fast-isel-abort=1 | FileCheck %s
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%0 = type { i64, i32, i8* }
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define tailcc i8* @"visit_array_aux<`Reference>"(%0 %arg, i32 %arg1) nounwind {
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fail: ; preds = %entry
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%tmp20 = tail call tailcc i8* @"visit_array_aux<`Reference>"(%0 %arg, i32 undef) ; <i8*> [#uses=1]
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; CHECK: jmp "_visit_array_aux<`Reference>" ## TAILCALL
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ret i8* %tmp20
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}
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define i32 @foo() nounwind {
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entry:
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%0 = tail call i32 (...) @bar() nounwind ; <i32> [#uses=1]
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ret i32 %0
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}
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declare i32 @bar(...) nounwind
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