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llvm-project/llvm/test/Transforms/InstCombine/call-guard.ll

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[InstCombine] Fix worklist management when removing guard intrinsic When multiple guard intrinsics are merged into one, currently the result of eraseInstFromFunction() is returned -- however, this should only be done if the current instruction is being removed. In this case we're removing a different instruction and should instead report that the current one has been modified by returning it. For this test case, this reduces the number of instcombine iterations from 5 to 2 (the minimum possible). Differential Revision: https://reviews.llvm.org/D72558
2020-01-11 22:10:50 +08:00
; RUN: opt < %s -instcombine -instcombine-infinite-loop-threshold=2 -S | FileCheck %s
[InstCombine] Fix call guard difference with dbg Patch by Chris Ye! Differential Revision: https://reviews.llvm.org/D68004
2019-11-23 05:02:18 +08:00
; RUN: opt < %s -instcombine -S -debugify-each | FileCheck %s
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
declare void @llvm.experimental.guard(i1, ...)
define void @test_guard_adjacent_same_cond(i1 %A) {
; CHECK-LABEL: @test_guard_adjacent_same_cond(
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 %A) [ "deopt"() ]
; CHECK-NEXT: ret void
call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
ret void
}
define void @test_guard_adjacent_diff_cond(i1 %A, i1 %B, i1 %C) {
; CHECK-LABEL: @test_guard_adjacent_diff_cond(
; CHECK-NEXT: %1 = and i1 %A, %B
; CHECK-NEXT: %2 = and i1 %1, %C
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 %2, i32 123) [ "deopt"() ]
; CHECK-NEXT: ret void
call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
call void(i1, ...) @llvm.experimental.guard( i1 %C, i32 789 )[ "deopt"() ]
ret void
}
; This version tests for the common form where the conditions are
; between the guards
define void @test_guard_adjacent_diff_cond2(i32 %V1, i32 %V2) {
; CHECK-LABEL: @test_guard_adjacent_diff_cond2(
; CHECK-NEXT: %1 = and i32 %V1, %V2
; CHECK-NEXT: %2 = icmp slt i32 %1, 0
; CHECK-NEXT: %and = and i32 %V1, 255
; CHECK-NEXT: %C = icmp ult i32 %and, 129
; CHECK-NEXT: %3 = and i1 %2, %C
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 %3, i32 123) [ "deopt"() ]
; CHECK-NEXT: ret void
%A = icmp slt i32 %V1, 0
call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
%B = icmp slt i32 %V2, 0
call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
%and = and i32 %V1, 255
%C = icmp sle i32 %and, 128
call void(i1, ...) @llvm.experimental.guard( i1 %C, i32 789 )[ "deopt"() ]
ret void
}
; Might not be legal to hoist the load above the first guard since the
; guard might control dereferenceability
define void @negative_load(i32 %V1, i32* %P) {
; CHECK-LABEL: @negative_load
; CHECK: @llvm.experimental.guard
; CHECK: @llvm.experimental.guard
%A = icmp slt i32 %V1, 0
call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
%V2 = load i32, i32* %P
%B = icmp slt i32 %V2, 0
call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
ret void
}
Make Value::getPointerAlignment() return an Align, not a MaybeAlign. If we don't know anything about the alignment of a pointer, Align(1) is still correct: all pointers are at least 1-byte aligned. Included in this patch is a bugfix for an issue discovered during this cleanup: pointers with "dereferenceable" attributes/metadata were assumed to be aligned according to the type of the pointer. This wasn't intentional, as far as I can tell, so Loads.cpp was fixed to stop making this assumption. Frontends may need to be updated. I updated clang's handling of C++ references, and added a release note for this. Differential Revision: https://reviews.llvm.org/D80072
2020-05-17 08:55:18 +08:00
define void @deref_load(i32 %V1, i32* dereferenceable(4) align 4 %P) {
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
; CHECK-LABEL: @deref_load
; CHECK-NEXT: %V2 = load i32, i32* %P, align 4
; CHECK-NEXT: %1 = and i32 %V2, %V1
; CHECK-NEXT: %2 = icmp slt i32 %1, 0
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 %2, i32 123) [ "deopt"() ]
%A = icmp slt i32 %V1, 0
call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
%V2 = load i32, i32* %P
%B = icmp slt i32 %V2, 0
call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
ret void
}
; The divide might fault above the guard
define void @negative_div(i32 %V1, i32 %D) {
; CHECK-LABEL: @negative_div
; CHECK: @llvm.experimental.guard
; CHECK: @llvm.experimental.guard
%A = icmp slt i32 %V1, 0
call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
%V2 = udiv i32 %V1, %D
%B = icmp slt i32 %V2, 0
call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
ret void
}
; Highlight the limit of the window in a case which would otherwise be mergable
define void @negative_window(i32 %V1, i32 %a, i32 %b, i32 %c, i32 %d) {
; CHECK-LABEL: @negative_window
; CHECK: @llvm.experimental.guard
; CHECK: @llvm.experimental.guard
%A = icmp slt i32 %V1, 0
call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
%V2 = add i32 %a, %b
%V3 = add i32 %V2, %c
%V4 = add i32 %V3, %d
%B = icmp slt i32 %V4, 0
call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
ret void
}