Nikita Popov 29441e4f5f
[IR] Convert from nocapture to captures(none) (#123181)
This PR removes the old `nocapture` attribute, replacing it with the new
`captures` attribute introduced in #116990. This change is
intended to be essentially NFC, replacing existing uses of `nocapture`
with `captures(none)` without adding any new analysis capabilities.
Making use of non-`none` values is left for a followup.

Some notes:
* `nocapture` will be upgraded to `captures(none)` by the bitcode
   reader.
* `nocapture` will also be upgraded by the textual IR reader. This is to
   make it easier to use old IR files and somewhat reduce the test churn in
   this PR.
* Helper APIs like `doesNotCapture()` will check for `captures(none)`.
* MLIR import will convert `captures(none)` into an `llvm.nocapture`
   attribute. The representation in the LLVM IR dialect should be updated
   separately.
2025-01-29 16:56:47 +01:00

55 lines
1.5 KiB
LLVM

; RUN: opt -passes=mergefunc -S < %s | FileCheck %s
; PR15185
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-n8:16:32-S128"
target triple = "i386-pc-linux-gnu"
%.qux.2496 = type { i32, %.qux.2497 }
%.qux.2497 = type { i8, i32 }
%.qux.2585 = type { i32, i32, ptr }
@g2 = external unnamed_addr constant [9 x i8], align 1
@g3 = internal unnamed_addr constant [1 x ptr] [ptr @func35]
define internal i32 @func1(ptr %ptr, ptr nocapture %method) align 2 {
bb:
br label %bb1
bb1: ; preds = %bb
br label %bb2
bb2: ; preds = %bb1
ret i32 undef
}
define internal i32 @func10(ptr nocapture %this) align 2 {
bb:
%tmp = getelementptr inbounds %.qux.2496, ptr %this, i32 0, i32 1, i32 1
%tmp1 = load i32, ptr %tmp, align 4
ret i32 %tmp1
}
define internal ptr @func29(ptr nocapture %this) align 2 {
bb:
ret ptr @g2
}
define internal ptr @func33(ptr nocapture %this) align 2 {
bb:
ret ptr undef
}
define internal ptr @func34(ptr nocapture %this) align 2 {
bb:
ret ptr undef
}
define internal ptr @func35(ptr nocapture %this) align 2 {
bb:
; CHECK-LABEL: @func35(
; CHECK: %[[V3:.+]] = tail call i32 @func10(ptr captures(none) %{{.*}})
; CHECK: %{{.*}} = inttoptr i32 %[[V3]] to ptr
%tmp = getelementptr inbounds %.qux.2585, ptr %this, i32 0, i32 2
%tmp1 = load ptr, ptr %tmp, align 4
ret ptr %tmp1
}