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https://github.com/RPCS3/llvm-mirror.git
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486c38b0cf
This is a code change to add support for changing instruction sequences of the form: load inc/dec of 8/16/32/64 bits store into the appropriate X86 inc/dec through memory instruction: inc[qlwb] / dec[qlwb] The checks that were in X86DAGToDAGISel::Select(SDNode *Node)>>ISD::STORE have been extracted to isLoadIncOrDecStore and reworked to use the better named wrappers for getOperand(unsigned) (e.g. getOffset()) and replaced Chain.getNode() with LoadNode. The comments have also been expanded. llvm-svn: 153635
180 lines
5.2 KiB
LLVM
180 lines
5.2 KiB
LLVM
; RUN: llc < %s -march=x86-64 | FileCheck %s
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%struct.obj = type { i64 }
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; CHECK: _Z7releaseP3obj
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define void @_Z7releaseP3obj(%struct.obj* nocapture %o) nounwind uwtable ssp {
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entry:
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; CHECK: decq (%{{rdi|rcx}})
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; CHECK-NEXT: je
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%refcnt = getelementptr inbounds %struct.obj* %o, i64 0, i32 0
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%0 = load i64* %refcnt, align 8, !tbaa !0
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%dec = add i64 %0, -1
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store i64 %dec, i64* %refcnt, align 8, !tbaa !0
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%tobool = icmp eq i64 %dec, 0
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br i1 %tobool, label %if.end, label %return
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if.end: ; preds = %entry
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%1 = bitcast %struct.obj* %o to i8*
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tail call void @free(i8* %1)
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br label %return
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return: ; preds = %entry, %if.end
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ret void
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}
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@c = common global i64 0, align 8
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@a = common global i32 0, align 4
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@.str = private unnamed_addr constant [5 x i8] c"%ld\0A\00", align 1
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@b = common global i32 0, align 4
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; CHECK: test
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define i32 @test() nounwind uwtable ssp {
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entry:
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; CHECK: decq
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; CHECK-NOT: decq
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%0 = load i64* @c, align 8, !tbaa !0
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%dec.i = add nsw i64 %0, -1
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store i64 %dec.i, i64* @c, align 8, !tbaa !0
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%tobool.i = icmp ne i64 %dec.i, 0
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%lor.ext.i = zext i1 %tobool.i to i32
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store i32 %lor.ext.i, i32* @a, align 4, !tbaa !3
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%call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([5 x i8]* @.str, i64 0, i64 0), i64 %dec.i) nounwind
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ret i32 0
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}
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; CHECK: test2
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define i32 @test2() nounwind uwtable ssp {
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entry:
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; CHECK-NOT: decq ({{.*}})
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%0 = load i64* @c, align 8, !tbaa !0
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%dec.i = add nsw i64 %0, -1
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store i64 %dec.i, i64* @c, align 8, !tbaa !0
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%tobool.i = icmp ne i64 %0, 0
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%lor.ext.i = zext i1 %tobool.i to i32
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store i32 %lor.ext.i, i32* @a, align 4, !tbaa !3
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%call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([5 x i8]* @.str, i64 0, i64 0), i64 %dec.i) nounwind
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ret i32 0
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}
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declare i32 @printf(i8* nocapture, ...) nounwind
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declare void @free(i8* nocapture) nounwind
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!0 = metadata !{metadata !"long", metadata !1}
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!1 = metadata !{metadata !"omnipotent char", metadata !2}
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!2 = metadata !{metadata !"Simple C/C++ TBAA", null}
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!3 = metadata !{metadata !"int", metadata !1}
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%struct.obj2 = type { i64, i32, i16, i8 }
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declare void @other(%struct.obj2* ) nounwind;
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; CHECK: example_dec
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define void @example_dec(%struct.obj2* %o) nounwind uwtable ssp {
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; 64 bit dec
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entry:
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%s64 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 0
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; CHECK-NOT: load
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%0 = load i64* %s64, align 8
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; CHECK: decq ({{.*}})
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%dec = add i64 %0, -1
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store i64 %dec, i64* %s64, align 8
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%tobool = icmp eq i64 %dec, 0
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br i1 %tobool, label %if.end, label %return
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; 32 bit dec
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if.end:
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%s32 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 1
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; CHECK-NOT: load
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%1 = load i32* %s32, align 4
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; CHECK: decl {{[0-9][0-9]*}}({{.*}})
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%dec1 = add i32 %1, -1
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store i32 %dec1, i32* %s32, align 4
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%tobool2 = icmp eq i32 %dec1, 0
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br i1 %tobool2, label %if.end1, label %return
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; 16 bit dec
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if.end1:
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%s16 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 2
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; CHECK-NOT: load
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%2 = load i16* %s16, align 2
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; CHECK: decw {{[0-9][0-9]*}}({{.*}})
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%dec2 = add i16 %2, -1
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store i16 %dec2, i16* %s16, align 2
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%tobool3 = icmp eq i16 %dec2, 0
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br i1 %tobool3, label %if.end2, label %return
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; 8 bit dec
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if.end2:
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%s8 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 3
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; CHECK-NOT: load
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%3 = load i8* %s8
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; CHECK: decb {{[0-9][0-9]*}}({{.*}})
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%dec3 = add i8 %3, -1
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store i8 %dec3, i8* %s8
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%tobool4 = icmp eq i8 %dec3, 0
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br i1 %tobool4, label %if.end4, label %return
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if.end4:
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tail call void @other(%struct.obj2* %o) nounwind
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br label %return
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return: ; preds = %if.end4, %if.end, %entry
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ret void
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}
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; CHECK: example_inc
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define void @example_inc(%struct.obj2* %o) nounwind uwtable ssp {
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; 64 bit inc
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entry:
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%s64 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 0
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; CHECK-NOT: load
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%0 = load i64* %s64, align 8
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; CHECK: incq ({{.*}})
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%inc = add i64 %0, 1
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store i64 %inc, i64* %s64, align 8
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%tobool = icmp eq i64 %inc, 0
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br i1 %tobool, label %if.end, label %return
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; 32 bit inc
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if.end:
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%s32 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 1
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; CHECK-NOT: load
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%1 = load i32* %s32, align 4
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; CHECK: incl {{[0-9][0-9]*}}({{.*}})
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%inc1 = add i32 %1, 1
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store i32 %inc1, i32* %s32, align 4
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%tobool2 = icmp eq i32 %inc1, 0
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br i1 %tobool2, label %if.end1, label %return
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; 16 bit inc
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if.end1:
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%s16 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 2
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; CHECK-NOT: load
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%2 = load i16* %s16, align 2
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; CHECK: incw {{[0-9][0-9]*}}({{.*}})
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%inc2 = add i16 %2, 1
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store i16 %inc2, i16* %s16, align 2
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%tobool3 = icmp eq i16 %inc2, 0
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br i1 %tobool3, label %if.end2, label %return
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; 8 bit inc
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if.end2:
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%s8 = getelementptr inbounds %struct.obj2* %o, i64 0, i32 3
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; CHECK-NOT: load
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%3 = load i8* %s8
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; CHECK: incb {{[0-9][0-9]*}}({{.*}})
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%inc3 = add i8 %3, 1
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store i8 %inc3, i8* %s8
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%tobool4 = icmp eq i8 %inc3, 0
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br i1 %tobool4, label %if.end4, label %return
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if.end4:
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tail call void @other(%struct.obj2* %o) nounwind
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br label %return
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return:
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ret void
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}
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